Effective method to hide email from spam bots

Question

On my homepage  I m using this method to hide my email from spam bots    lt a href  admin  at  example com     rel  nofollow     onclick  this href  mailto      admin           example com   gt Contact me lt  a gt    What do you think about it  Is it effective  What other methods do you know or use

User · Answer

You can try to hide characters using html entities in hexa  ex   amp  x40 for     This is convenient solution  as a correct browser will translate it  and you can have a normal link  The drawback is that a bot can translate it theorically  but it s a bit unusual  I use this to protect my e-mail on my blog   Another solution is to use javascript to assemble part of the address and to decode on-the-fly the address  The drawback is that a javascript-disabled browser won t show your adress   The most effective solution is to use an image  but it s a pain for the user to have to copy the address by hand   Your solution is pretty good  as you only add a drawback  writing manually the    only for user that have javascript disabled  You can also be more secure with    onclick  this href  mailto      admin      amp  x40      domain com

User · Answer

Here is a simple jquery solution to this problem    lt script type  text javascript  gt    document  ready function         str1  mailto        str2  info       str3   test com           email a   attr  href   str1 str2 str3         lt  script gt    lt a href     id  email a  gt  lt img src  sample png   gt  lt  a gt

User · Answer

- Adding this for reference  don t know how outdated the information might be  but it tells about a few simple solutions that don t require the use of any scripting  After searching for this myself i came across this page but also these pages   http   nadeausoftware com articles 2007 05 stop spammer email harvesters obfuscating email addresses  try reversing the emailadress  Example plain HTML    lt bdo dir  rtl  gt moc elpmaxe nosrep lt  bdo gt  Result   person example com   The same effect using CSS  CSS   reverse   unicode-bidi bidi-override  direction rtl    HTML   lt span class  reverse  gt moc elpmaxe nosrep lt  span gt  Result   person example com   Combining this with any of earlier mentioned methods may even make it more effective

User · Answer

Have a look at this way  pretty clever and using css   CSS  span reverse     unicode-bidi  bidi-override    direction  rtl      HTML     lt span class  reverse  gt moc rehtrebttam retsambew lt  span gt    The CSS above will then override the reading direction and present the text to the user in the correct order     Hope it helps  Cheers

User · Answer

I have a completely different take on this   I use MailHide for this   MailHide is a system from Google whereby the user needs to complete a reCAPTCHA test to then reveal the email to them

User · Answer

I have a completely different take on this   I use MailHide for this   MailHide is a system from Google whereby the user needs to complete a reCAPTCHA test to then reveal the email to them

User · Answer

One easy solution is to use HTML entities instead of actual characters  For example  the  me example com  will be converted into     lt a href   amp  109  amp  97  amp  105  amp  108  amp  116  amp  111  amp  58  amp  109  amp  101  amp  64  amp  101  amp  120  amp  97  amp  109  amp  112  amp  108  amp  101  amp  46  amp  99  amp  111  amp  109   gt email me lt  A gt

User · Answer

See Making email addresses safe from bots on a webpage   I like the way Facebook and others render an image of your email address   I have also used The Enkoder in the past - thought it was very good to be honest

User · Answer

There are probably bots that recognize the  at  and other disguises as   symbol  So this is not a really effective method   Sure you could use some encodings like URL encode or HTML character references  or both       PHP example    encodes every character using URL encoding   hh  function foo  str         retVal            length   strlen  str       for   i 0   i lt  length   i     retVal  sprintf     X   ord  str  i         return  retVal       encodes every character into HTML character references   amp  xhh   function bar  str         retVal            length   strlen  str       for   i 0   i lt  length   i     retVal  sprintf   amp  x X    ord  str  i         return  retVal      email    user example com   echo   lt a href    bar  mailto  to     foo      email         gt mail me lt  a gt        output     lt a href   amp  x6D  amp  x61  amp  x69  amp  x6C  amp  x74  amp  x6F  amp  x3A  amp  x3F  amp  x74  amp  x6F  amp  x3D  amp  x25  amp  x32  amp  x43  amp  x25  amp  x37  amp  x35  amp  x25  amp  x37  amp  x33  amp  x25  amp  x36  amp  x35  amp  x25  amp  x37  amp  x32  amp  x25  amp  x34  amp  x30  amp  x25  amp  x36  amp  x35  amp  x25  amp  x37  amp  x38  amp  x25  amp  x36  amp  x31  amp  x25  amp  x36  amp  x44  amp  x25  amp  x37  amp  x30  amp  x25  amp  x36  amp  x43  amp  x25  amp  x36  amp  x35  amp  x25  amp  x32  amp  x45  amp  x25  amp  x36  amp  x33  amp  x25  amp  x36  amp  x46  amp  x25  amp  x36  amp  x44   gt mail me lt  a gt    But as it is legal to use them  every browser e-mail client should handle these encodings too

User · Answer

A neat trick is to have a div with the word Contact and reveal the email address only when the user moves the mouse over it  E-mail can be Base64-encoded for extra protection  Here s how   lt div id  quot contacts quot  gt Contacts lt  div gt    lt script gt    document querySelector  quot  contacts quot   addEventListener  quot mouseover quot    event    gt           Base64-encode your email and provide it as argument to atob       event target textContent   atob  aW5mb0BjbGV2ZXJpbmcuZWU           lt  script gt

User · Answer

I use a very simple combination of CSS and jQuery which displays the email address correctly to the user and also works when the anchor is clicked or hovered   HTML    lt a href  mailto me example spam  id  lnkMail  gt moc elpmaxe em lt  a gt    CSS    lnkMail       unicode-bidi  bidi-override      direction  rtl      jQuery       lnkMail   hover function           here you can use whatever replace you want     var newHref     this  attr  href   replace  spam    com          this  attr  href   newHref         Here is a working example

User · Answer

You can try to hide characters using html entities in hexa  ex   amp  x40 for     This is convenient solution  as a correct browser will translate it  and you can have a normal link  The drawback is that a bot can translate it theorically  but it s a bit unusual  I use this to protect my e-mail on my blog   Another solution is to use javascript to assemble part of the address and to decode on-the-fly the address  The drawback is that a javascript-disabled browser won t show your adress   The most effective solution is to use an image  but it s a pain for the user to have to copy the address by hand   Your solution is pretty good  as you only add a drawback  writing manually the    only for user that have javascript disabled  You can also be more secure with    onclick  this href  mailto      admin      amp  x40      domain com

User · Answer

Here is a simple jquery solution to this problem    lt script type  text javascript  gt    document  ready function         str1  mailto        str2  info       str3   test com           email a   attr  href   str1 str2 str3         lt  script gt    lt a href     id  email a  gt  lt img src  sample png   gt  lt  a gt

User · Answer

I just have to provide an another answer  I just came up with something fun to play with   I found out that in many common character tables  the letters   and a-z reappear more than once  You can map the original characters to the new mappings and make it harder for spam bots to figure out what the e-mail is   If you loop through the string  and get the character code of a letter  then add 65248 to it and build a html entity based on the number  you come up with a human readable e-mail address    var str    john doe email com   str   str toLowerCase   replace      a-z  gi  function match  position  str       var num   str charCodeAt position       return    amp       num   65248                Here is a working fiddle  http   jsfiddle net EhtSC 8   You can improve this approach by creating a more complete set of mappings between characters that look the same  But if you copy paste the e-mail to notepad  for example  you get a lot of boxes   To overcome some of the user experience issues  I created the e-mail as link  When you click it  it remaps the characters back to their originals   To improve this  you can create more complex character mappings if you like  If you can find several characters that can be used for example in the place of  a  why not randomly mapping to those   Probably not the most secure approach ever but I really had fun playing around with it  D

User · Answer

after using so many techniques i found an easy way and very friendly  the bots search for   S  mbolo and recently they search for  at  ant it s variation so i use 2 techniques   i write my email on an image like the domaintolls use and it works perfectly or to replace the S  mbolo     with an image of it like    and the image alt will be alt     so the bot will find an image and any human will see it as a normal address so if he copy it he will copy the email and the job is don so the code will be    lt p gt myname lt img src  http   www traidnt net vb images mail2 gif  width  11  height  9  alt       gt domain com lt  p gt

User · Answer

There is a open licence PHP script that outputs javascript which encodes the mail  http   www maurits vdschee nl php hide email   You can then easily call the php function with the specific mail as an argument

User · Answer

I don t like JavaScript and HTML to be mixed  that s why I use this solution  It works fine for me  for now   Idea  you could make it more complicated by providing encrypted information in the data-attributes and decrypt it within the JS  This is simply done by replacing letters or just reversing them    HTML     lt span class  generate-email  data-part1  john  data-part2  gmail  data-part3  com  gt placeholder lt  span gt    JS     function             generate-email   each function             var that     this           that html              that data  part1           that data  part2           that data  part3                              Try it  http   jsfiddle net x6g9L817

User · Answer

Have a look at this way  pretty clever and using css   CSS  span reverse     unicode-bidi  bidi-override    direction  rtl      HTML     lt span class  reverse  gt moc rehtrebttam retsambew lt  span gt    The CSS above will then override the reading direction and present the text to the user in the correct order     Hope it helps  Cheers

User · Answer

Working with content and attr in CSS    x000D   x000D   cryptedmail after   x000D    content  attr data-name      attr data-domain      attr data-tld    x000D    x000D   lt a href     class  cryptedmail  x000D     data-name  info  x000D     data-domain  example  x000D     data-tld  org  x000D     onclick  window location href    mailto     this dataset name         this dataset domain         this dataset tld  return false   gt  lt  a gt  x000D   x000D   x000D    When javascript is disabled  just the click event will not work  email is still displayed   Another interesting approach  at least without a click event  would be to make use of the right-to-left mark to override the writing direction  more about this  https   en wikipedia org wiki Right-to-left mark

User · Answer

If you have php support  you can do something like this     lt img src  scriptname php  gt    And the scriptname php    lt  php header  Content-type  image png       Your email address which will be shown in the image  email          you yourdomain com    length          strlen  email  8    im    ImageCreate   length  20       or die   Kann keinen neuen GD-Bild-Stream erzeugen     background color   ImageColorAllocate   im  255  255  255      White  255 255 255  text color   ImageColorAllocate   im  55  103  122   imagestring  im  3 5 2  email   text color   imagepng   im     gt

User · Answer

If you have php support  you can do something like this     lt img src  scriptname php  gt    And the scriptname php    lt  php header  Content-type  image png       Your email address which will be shown in the image  email          you yourdomain com    length          strlen  email  8    im    ImageCreate   length  20       or die   Kann keinen neuen GD-Bild-Stream erzeugen     background color   ImageColorAllocate   im  255  255  255      White  255 255 255  text color   ImageColorAllocate   im  55  103  122   imagestring  im  3 5 2  email   text color   imagepng   im     gt

User · Answer

what about HTML CHARACTER    joe amp  064 mail com   outputs  joe mail com

User · Answer

The best method hiding email addresses is only good until bot programmer discover this  encoding  and implement a decryption algorithm   The JavaScript option won t work long  because there are a lot of crawler interpreting JavaScript   There s no answer  imho

User · Answer

I think the only foolproof method you can have is creating a Contact Me page that is a form that submits to a script that sends to your email address   That way  your address is never exposed to the public at all   This may be undesirable for some reason  but I think it s a pretty good solution   It often irks me when I m forced to copy paste someone s email address from their site to my mail client and send them a message  I d rather do it right through a form on their site   Also  this approach allows you to have anonymous comments sent to you  etc   Just be sure to protect your form using some kind of anti-bot scheme  such as a captcha   There are plenty of them discussed here on SO

User · Answer

I have a completely different take on this   I use MailHide for this   MailHide is a system from Google whereby the user needs to complete a reCAPTCHA test to then reveal the email to them

User · Answer

The best method hiding email addresses is only good until bot programmer discover this  encoding  and implement a decryption algorithm   The JavaScript option won t work long  because there are a lot of crawler interpreting JavaScript   There s no answer  imho

User · Answer

I don t like JavaScript and HTML to be mixed  that s why I use this solution  It works fine for me  for now   Idea  you could make it more complicated by providing encrypted information in the data-attributes and decrypt it within the JS  This is simply done by replacing letters or just reversing them    HTML     lt span class  generate-email  data-part1  john  data-part2  gmail  data-part3  com  gt placeholder lt  span gt    JS     function             generate-email   each function             var that     this           that html              that data  part1           that data  part2           that data  part3                              Try it  http   jsfiddle net x6g9L817

User · Answer

Not my idea originally but I can t find the author    lt a href  mailto coxntact domainx com      onmouseover  this href this href replace  x g       gt link lt  a gt    Add as many x s as you like  It works perfectly to read  copy and paste  and can t be read by a bot

User · Answer

Here is my working version     Create somewhere a container with a fallback text    lt div id  knock knock  gt Activate JavaScript  please  lt  div gt    And add at the bottom of the DOM  w r t  the rendering  the following snippet    lt script gt     function d id lhs rhs       d getElementById id  innerHTML     lt a rel   nofollow   href   mailto      lhs     rhs     gt    Mail    lt   a gt         window document   knock knock    your name    example com     lt  script gt    It adds the generated hyperlink to the specified container    lt div id  knock knock  gt  lt a rel  nofollow  href  your name example com  gt Mail lt  a gt  lt  div gt    In addition here is a minified version    lt script gt  function d i l r  d getElementById i  innerHTML   lt a rel   nofollow   href   mailto      l     r     gt    Mail    lt   a gt      window document  knock knock   your name   example com    lt  script gt

User · Answer

I am a fan of SpamSpan - it is obfuscated  but still decipherable if JS is disabled  It seems to work too  although I ve only been using it for about a year on a low-traffic website   There is also a module for Drupal to automatically turn emails into SpamSpans  if you need one

User · Answer

One easy solution is to use HTML entities instead of actual characters  For example  the  me example com  will be converted into     lt a href   amp  109  amp  97  amp  105  amp  108  amp  116  amp  111  amp  58  amp  109  amp  101  amp  64  amp  101  amp  120  amp  97  amp  109  amp  112  amp  108  amp  101  amp  46  amp  99  amp  111  amp  109   gt email me lt  A gt

User · Answer

There are probably bots that recognize the  at  and other disguises as   symbol  So this is not a really effective method   Sure you could use some encodings like URL encode or HTML character references  or both       PHP example    encodes every character using URL encoding   hh  function foo  str         retVal            length   strlen  str       for   i 0   i lt  length   i     retVal  sprintf     X   ord  str  i         return  retVal       encodes every character into HTML character references   amp  xhh   function bar  str         retVal            length   strlen  str       for   i 0   i lt  length   i     retVal  sprintf   amp  x X    ord  str  i         return  retVal      email    user example com   echo   lt a href    bar  mailto  to     foo      email         gt mail me lt  a gt        output     lt a href   amp  x6D  amp  x61  amp  x69  amp  x6C  amp  x74  amp  x6F  amp  x3A  amp  x3F  amp  x74  amp  x6F  amp  x3D  amp  x25  amp  x32  amp  x43  amp  x25  amp  x37  amp  x35  amp  x25  amp  x37  amp  x33  amp  x25  amp  x36  amp  x35  amp  x25  amp  x37  amp  x32  amp  x25  amp  x34  amp  x30  amp  x25  amp  x36  amp  x35  amp  x25  amp  x37  amp  x38  amp  x25  amp  x36  amp  x31  amp  x25  amp  x36  amp  x44  amp  x25  amp  x37  amp  x30  amp  x25  amp  x36  amp  x43  amp  x25  amp  x36  amp  x35  amp  x25  amp  x32  amp  x45  amp  x25  amp  x36  amp  x33  amp  x25  amp  x36  amp  x46  amp  x25  amp  x36  amp  x44   gt mail me lt  a gt    But as it is legal to use them  every browser e-mail client should handle these encodings too

User · Answer

One easy solution is to use HTML entities instead of actual characters  For example  the  me example com  will be converted into     lt a href   amp  109  amp  97  amp  105  amp  108  amp  116  amp  111  amp  58  amp  109  amp  101  amp  64  amp  101  amp  120  amp  97  amp  109  amp  112  amp  108  amp  101  amp  46  amp  99  amp  111  amp  109   gt email me lt  A gt

User · Answer

The best method hiding email addresses is only good until bot programmer discover this  encoding  and implement a decryption algorithm   The JavaScript option won t work long  because there are a lot of crawler interpreting JavaScript   There s no answer  imho

User · Answer

And my function  I ve created it looking at answers placed in this topic    function antiboteEmail  email              html                 email   strrev  email            randId   rand 1  500             html      lt span id  addr-   randId    class  addr  gt  turn javascript on to see the e-mail  lt  span gt             html     lt  lt  lt EOD                  lt script gt                    document  ready function                         var addr     email                       addr   addr split     reverse   join                              addr- randId   html   lt a href   mailto     addr       gt     addr      lt  a gt                                          lt  script gt  EOD           return  html          It uses two methods  right to left dir and javascript putting

User · Answer

One of my favorite methods is to obfuscate the email address using php  a classic example is to convert the characters to HEX values like so   function myobfiscate  emailaddress     email   emailaddress                    length   strlen  email                             for   i   0   i  lt   length   i                       obfuscatedEmail      amp      ord  email  i            echo  obfuscatedEmail      And then in my markup I ll simply call it as follows      lt a href  mailto  lt  php echo myobfiscate  someone somewhere com      gt   title  Email me   gt  lt  php echo myobfiscate  someone somewhere com     gt   lt  a gt    Then examine your source  you ll be pleasantly surprised

User · Answer

Spambots won t interpret this  because it is a lesser-known method     First  define the css   email before       content   admin      email after       content    example com       Now  wherever you want to display your email  simply insert the following HTML    lt div id  email  gt  lt  div gt    And tada

User · Answer

I am a fan of SpamSpan - it is obfuscated  but still decipherable if JS is disabled  It seems to work too  although I ve only been using it for about a year on a low-traffic website   There is also a module for Drupal to automatically turn emails into SpamSpans  if you need one

User · Answer

And my function  I ve created it looking at answers placed in this topic    function antiboteEmail  email              html                 email   strrev  email            randId   rand 1  500             html      lt span id  addr-   randId    class  addr  gt  turn javascript on to see the e-mail  lt  span gt             html     lt  lt  lt EOD                  lt script gt                    document  ready function                         var addr     email                       addr   addr split     reverse   join                              addr- randId   html   lt a href   mailto     addr       gt     addr      lt  a gt                                          lt  script gt  EOD           return  html          It uses two methods  right to left dir and javascript putting

User · Answer

Have a look at this way  pretty clever and using css   CSS  span reverse     unicode-bidi  bidi-override    direction  rtl      HTML     lt span class  reverse  gt moc rehtrebttam retsambew lt  span gt    The CSS above will then override the reading direction and present the text to the user in the correct order     Hope it helps  Cheers

User · Answer

If you have php support  you can do something like this     lt img src  scriptname php  gt    And the scriptname php    lt  php header  Content-type  image png       Your email address which will be shown in the image  email          you yourdomain com    length          strlen  email  8    im    ImageCreate   length  20       or die   Kann keinen neuen GD-Bild-Stream erzeugen     background color   ImageColorAllocate   im  255  255  255      White  255 255 255  text color   ImageColorAllocate   im  55  103  122   imagestring  im  3 5 2  email   text color   imagepng   im     gt

User · Answer

Does it work if I right-click on the link and choose  copy URL   If not  it s very much not an ideal situation  I very seldom click on a mailto link  preferring to copy the email address and paste it into my mail application or wherever else I need it at a specific point in time    I used to be fairly paranoid protecting my mail address on-line  UseNet  web and the like   but these days I suspect more  possible targets for spam  are actually generated matching local-parts to domains programmatically  I base this on having  on occasion  gone through my mail server logs  There tends to be quite a few delivery attempts to non-existing addresses  including truncated versions of spam-bait I dangled on UseNet back in the late 90s  when address-scraping was very prevalent

User · Answer

The best method hiding email addresses is only good until bot programmer discover this  encoding  and implement a decryption algorithm   The JavaScript option won t work long  because there are a lot of crawler interpreting JavaScript   There s no answer  imho

User · Answer

First I would make sure the email address only shows when you have javascript enabled  This way  there is no plain text that can be read without javascript   Secondly  A way of implementing a safe feature is by staying away from the  lt button gt  tag  This tag needs a text insert between the tags  which makes it computer-readable  Instead try the  lt input type  button  gt  with a javascript handler for an onClick  Then use all of the techniques mentioned by otherse to implement a safe email notation   One other option is to have a button with  Click to see emailaddress   Once clicked this changes into a coded email  the characters in HTML codes   On another click this redirects to the  mailto email  function  An uncoded version of the last idea  with selectable and non-selectable email addresses    lt html gt   lt body gt   lt script type  text javascript  gt        e1   domain         e2  me         e3   extension   email link  mailto   e2 e1 e3   lt  script gt   lt input type  text  onClick  this onClick window open email link    value  Click for mail   gt   lt input type  text  onClick  this value email   value  Click for mail-address   gt   lt input type  button  onClick  this onClick window open email link    value  Click for mail   gt   lt input type  button  onClick  this value email   value  Click for mail-address   gt   lt  body gt  lt  html gt    See if this is something you would want and combine it with others  ideas  You can never be too sure

User · Answer

- Adding this for reference  don t know how outdated the information might be  but it tells about a few simple solutions that don t require the use of any scripting  After searching for this myself i came across this page but also these pages   http   nadeausoftware com articles 2007 05 stop spammer email harvesters obfuscating email addresses  try reversing the emailadress  Example plain HTML    lt bdo dir  rtl  gt moc elpmaxe nosrep lt  bdo gt  Result   person example com   The same effect using CSS  CSS   reverse   unicode-bidi bidi-override  direction rtl    HTML   lt span class  reverse  gt moc elpmaxe nosrep lt  span gt  Result   person example com   Combining this with any of earlier mentioned methods may even make it more effective

User · Answer

See Making email addresses safe from bots on a webpage   I like the way Facebook and others render an image of your email address   I have also used The Enkoder in the past - thought it was very good to be honest

User · Answer

There are probably bots that recognize the  at  and other disguises as   symbol  So this is not a really effective method   Sure you could use some encodings like URL encode or HTML character references  or both       PHP example    encodes every character using URL encoding   hh  function foo  str         retVal            length   strlen  str       for   i 0   i lt  length   i     retVal  sprintf     X   ord  str  i         return  retVal       encodes every character into HTML character references   amp  xhh   function bar  str         retVal            length   strlen  str       for   i 0   i lt  length   i     retVal  sprintf   amp  x X    ord  str  i         return  retVal      email    user example com   echo   lt a href    bar  mailto  to     foo      email         gt mail me lt  a gt        output     lt a href   amp  x6D  amp  x61  amp  x69  amp  x6C  amp  x74  amp  x6F  amp  x3A  amp  x3F  amp  x74  amp  x6F  amp  x3D  amp  x25  amp  x32  amp  x43  amp  x25  amp  x37  amp  x35  amp  x25  amp  x37  amp  x33  amp  x25  amp  x36  amp  x35  amp  x25  amp  x37  amp  x32  amp  x25  amp  x34  amp  x30  amp  x25  amp  x36  amp  x35  amp  x25  amp  x37  amp  x38  amp  x25  amp  x36  amp  x31  amp  x25  amp  x36  amp  x44  amp  x25  amp  x37  amp  x30  amp  x25  amp  x36  amp  x43  amp  x25  amp  x36  amp  x35  amp  x25  amp  x32  amp  x45  amp  x25  amp  x36  amp  x33  amp  x25  amp  x36  amp  x46  amp  x25  amp  x36  amp  x44   gt mail me lt  a gt    But as it is legal to use them  every browser e-mail client should handle these encodings too

User · Answer

First I would make sure the email address only shows when you have javascript enabled  This way  there is no plain text that can be read without javascript   Secondly  A way of implementing a safe feature is by staying away from the  lt button gt  tag  This tag needs a text insert between the tags  which makes it computer-readable  Instead try the  lt input type  button  gt  with a javascript handler for an onClick  Then use all of the techniques mentioned by otherse to implement a safe email notation   One other option is to have a button with  Click to see emailaddress   Once clicked this changes into a coded email  the characters in HTML codes   On another click this redirects to the  mailto email  function  An uncoded version of the last idea  with selectable and non-selectable email addresses    lt html gt   lt body gt   lt script type  text javascript  gt        e1   domain         e2  me         e3   extension   email link  mailto   e2 e1 e3   lt  script gt   lt input type  text  onClick  this onClick window open email link    value  Click for mail   gt   lt input type  text  onClick  this value email   value  Click for mail-address   gt   lt input type  button  onClick  this onClick window open email link    value  Click for mail   gt   lt input type  button  onClick  this value email   value  Click for mail-address   gt   lt  body gt  lt  html gt    See if this is something you would want and combine it with others  ideas  You can never be too sure

User · Answer

Option 1    Split email address into multiple parts and create an array in JavaScript out of these parts   Next join these parts in the correct order and use the  innerHTML property to add the email address to the web page     lt span id  email  gt    lt  span gt       blank tag    lt script gt   var parts     info    XXXXabc    com     amp  46      amp  64      var email   parts 0    parts 4    parts 1    parts 3    parts 2    document getElementById  email   innerHTML email     lt  script gt    Option 2   Use image instead of email text  Image creator website from text   http   www chxo com labelgen    Option 3   We can use AT instead of      and DOT  instead of          i e          info AT XXXabc DOT com

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You can try to hide characters using html entities in hexa  ex   amp  x40 for     This is convenient solution  as a correct browser will translate it  and you can have a normal link  The drawback is that a bot can translate it theorically  but it s a bit unusual  I use this to protect my e-mail on my blog   Another solution is to use javascript to assemble part of the address and to decode on-the-fly the address  The drawback is that a javascript-disabled browser won t show your adress   The most effective solution is to use an image  but it s a pain for the user to have to copy the address by hand   Your solution is pretty good  as you only add a drawback  writing manually the    only for user that have javascript disabled  You can also be more secure with    onclick  this href  mailto      admin      amp  x40      domain com

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Does it work if I right-click on the link and choose  copy URL   If not  it s very much not an ideal situation  I very seldom click on a mailto link  preferring to copy the email address and paste it into my mail application or wherever else I need it at a specific point in time    I used to be fairly paranoid protecting my mail address on-line  UseNet  web and the like   but these days I suspect more  possible targets for spam  are actually generated matching local-parts to domains programmatically  I base this on having  on occasion  gone through my mail server logs  There tends to be quite a few delivery attempts to non-existing addresses  including truncated versions of spam-bait I dangled on UseNet back in the late 90s  when address-scraping was very prevalent

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I think the only foolproof method you can have is creating a Contact Me page that is a form that submits to a script that sends to your email address   That way  your address is never exposed to the public at all   This may be undesirable for some reason  but I think it s a pretty good solution   It often irks me when I m forced to copy paste someone s email address from their site to my mail client and send them a message  I d rather do it right through a form on their site   Also  this approach allows you to have anonymous comments sent to you  etc   Just be sure to protect your form using some kind of anti-bot scheme  such as a captcha   There are plenty of them discussed here on SO

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I think the only foolproof method you can have is creating a Contact Me page that is a form that submits to a script that sends to your email address   That way  your address is never exposed to the public at all   This may be undesirable for some reason  but I think it s a pretty good solution   It often irks me when I m forced to copy paste someone s email address from their site to my mail client and send them a message  I d rather do it right through a form on their site   Also  this approach allows you to have anonymous comments sent to you  etc   Just be sure to protect your form using some kind of anti-bot scheme  such as a captcha   There are plenty of them discussed here on SO

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There is a open licence PHP script that outputs javascript which encodes the mail  http   www maurits vdschee nl php hide email   You can then easily call the php function with the specific mail as an argument

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I use a very simple combination of CSS and jQuery which displays the email address correctly to the user and also works when the anchor is clicked or hovered   HTML    lt a href  mailto me example spam  id  lnkMail  gt moc elpmaxe em lt  a gt    CSS    lnkMail       unicode-bidi  bidi-override      direction  rtl      jQuery       lnkMail   hover function           here you can use whatever replace you want     var newHref     this  attr  href   replace  spam    com          this  attr  href   newHref         Here is a working example

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There are probably bots that recognize the  at  and other disguises as   symbol  So this is not a really effective method   Sure you could use some encodings like URL encode or HTML character references  or both       PHP example    encodes every character using URL encoding   hh  function foo  str         retVal            length   strlen  str       for   i 0   i lt  length   i     retVal  sprintf     X   ord  str  i         return  retVal       encodes every character into HTML character references   amp  xhh   function bar  str         retVal            length   strlen  str       for   i 0   i lt  length   i     retVal  sprintf   amp  x X    ord  str  i         return  retVal      email    user example com   echo   lt a href    bar  mailto  to     foo      email         gt mail me lt  a gt        output     lt a href   amp  x6D  amp  x61  amp  x69  amp  x6C  amp  x74  amp  x6F  amp  x3A  amp  x3F  amp  x74  amp  x6F  amp  x3D  amp  x25  amp  x32  amp  x43  amp  x25  amp  x37  amp  x35  amp  x25  amp  x37  amp  x33  amp  x25  amp  x36  amp  x35  amp  x25  amp  x37  amp  x32  amp  x25  amp  x34  amp  x30  amp  x25  amp  x36  amp  x35  amp  x25  amp  x37  amp  x38  amp  x25  amp  x36  amp  x31  amp  x25  amp  x36  amp  x44  amp  x25  amp  x37  amp  x30  amp  x25  amp  x36  amp  x43  amp  x25  amp  x36  amp  x35  amp  x25  amp  x32  amp  x45  amp  x25  amp  x36  amp  x33  amp  x25  amp  x36  amp  x46  amp  x25  amp  x36  amp  x44   gt mail me lt  a gt    But as it is legal to use them  every browser e-mail client should handle these encodings too

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Does it work if I right-click on the link and choose  copy URL   If not  it s very much not an ideal situation  I very seldom click on a mailto link  preferring to copy the email address and paste it into my mail application or wherever else I need it at a specific point in time    I used to be fairly paranoid protecting my mail address on-line  UseNet  web and the like   but these days I suspect more  possible targets for spam  are actually generated matching local-parts to domains programmatically  I base this on having  on occasion  gone through my mail server logs  There tends to be quite a few delivery attempts to non-existing addresses  including truncated versions of spam-bait I dangled on UseNet back in the late 90s  when address-scraping was very prevalent

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I like ofaurax s answer best but I would modify to this for a little more hidden email   onclick  p1  admin   p2  domain com   this href  mailto     p1     amp   x40     p2

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Have a look at this way  pretty clever and using css   CSS  span reverse     unicode-bidi  bidi-override    direction  rtl      HTML     lt span class  reverse  gt moc rehtrebttam retsambew lt  span gt    The CSS above will then override the reading direction and present the text to the user in the correct order     Hope it helps  Cheers

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This is the method I used  with a server-side include  e g   lt  -- include file  emailObfuscator include  -- gt  where emailObfuscator include contains the following    lt  --    http   lists evolt org archive Week-of-Mon-20040202 154813 html -- gt   lt script type  text javascript  gt      function gen mail to link lhs rhs subject            document write   lt a href   mailto            document write       lhs                 document write rhs     subject     subject       gt     lhs         rhs     lt   a gt            lt  script gt    To include an address  I use JavaScript    lt script type  text javascript  gt       gen mail to link  john doe   example com   Feedback about your site        lt  script gt   lt noscript gt     lt em gt Email address protected by JavaScript  Activate JavaScript to see the email  lt  em gt   lt  noscript gt    Because I have been getting email via Gmail since 2005  spam is pretty much a non-issue  So  I can t speak of how effective this method is  You might want to read this study  although it s old  that produced this graph

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Another option  I perefer font awesome icons  Fa implementation    lt link rel  stylesheet  href  path to font-awesome css font-awesome min css  gt    Mail Address    lt a href  mailto info uploadimage club  gt  lt span class  label  gt info lt i class  fa fa-at  gt  lt  i gt uploadimage club lt  span gt  lt  a gt

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This is the method I used  with a server-side include  e g   lt  -- include file  emailObfuscator include  -- gt  where emailObfuscator include contains the following    lt  --    http   lists evolt org archive Week-of-Mon-20040202 154813 html -- gt   lt script type  text javascript  gt      function gen mail to link lhs rhs subject            document write   lt a href   mailto            document write       lhs                 document write rhs     subject     subject       gt     lhs         rhs     lt   a gt            lt  script gt    To include an address  I use JavaScript    lt script type  text javascript  gt       gen mail to link  john doe   example com   Feedback about your site        lt  script gt   lt noscript gt     lt em gt Email address protected by JavaScript  Activate JavaScript to see the email  lt  em gt   lt  noscript gt    Because I have been getting email via Gmail since 2005  spam is pretty much a non-issue  So  I can t speak of how effective this method is  You might want to read this study  although it s old  that produced this graph

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One possibility would be to use isTrusted property  Javascript    The isTrusted read-only property of the Event interface is a Boolean that is true when the event was generated by a user action  and false when the event was created or modified by a script or dispatched via EventTarget dispatchEvent     eg in your case  getEmail       if  event isTrusted           The event is trusted        return  your-email domain com       else          The event is not trusted        return  chuck norris com            IE isn t compatible   Read more from doc  https   developer mozilla org en-US docs Web API Event isTrusted

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One possibility would be to use isTrusted property  Javascript    The isTrusted read-only property of the Event interface is a Boolean that is true when the event was generated by a user action  and false when the event was created or modified by a script or dispatched via EventTarget dispatchEvent     eg in your case  getEmail       if  event isTrusted           The event is trusted        return  your-email domain com       else          The event is not trusted        return  chuck norris com            IE isn t compatible   Read more from doc  https   developer mozilla org en-US docs Web API Event isTrusted

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Not my idea originally but I can t find the author    lt a href  mailto coxntact domainx com      onmouseover  this href this href replace  x g       gt link lt  a gt    Add as many x s as you like  It works perfectly to read  copy and paste  and can t be read by a bot

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I have a completely different take on this   I use MailHide for this   MailHide is a system from Google whereby the user needs to complete a reCAPTCHA test to then reveal the email to them

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This is probably the best and easiest email protector on the internet  Very simple yet it has the ability to add all the bells and whistles   Protecting Email on webpages  Uses JavaScript   I ve been using it successfully for years

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This is probably the best and easiest email protector on the internet  Very simple yet it has the ability to add all the bells and whistles   Protecting Email on webpages  Uses JavaScript   I ve been using it successfully for years

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Option 1    Split email address into multiple parts and create an array in JavaScript out of these parts   Next join these parts in the correct order and use the  innerHTML property to add the email address to the web page     lt span id  email  gt    lt  span gt       blank tag    lt script gt   var parts     info    XXXXabc    com     amp  46      amp  64      var email   parts 0    parts 4    parts 1    parts 3    parts 2    document getElementById  email   innerHTML email     lt  script gt    Option 2   Use image instead of email text  Image creator website from text   http   www chxo com labelgen    Option 3   We can use AT instead of      and DOT  instead of          i e          info AT XXXabc DOT com

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Here is my working version     Create somewhere a container with a fallback text    lt div id  knock knock  gt Activate JavaScript  please  lt  div gt    And add at the bottom of the DOM  w r t  the rendering  the following snippet    lt script gt     function d id lhs rhs       d getElementById id  innerHTML     lt a rel   nofollow   href   mailto      lhs     rhs     gt    Mail    lt   a gt         window document   knock knock    your name    example com     lt  script gt    It adds the generated hyperlink to the specified container    lt div id  knock knock  gt  lt a rel  nofollow  href  your name example com  gt Mail lt  a gt  lt  div gt    In addition here is a minified version    lt script gt  function d i l r  d getElementById i  innerHTML   lt a rel   nofollow   href   mailto      l     r     gt    Mail    lt   a gt      window document  knock knock   your name   example com    lt  script gt

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A neat trick is to have a div with the word Contact and reveal the email address only when the user moves the mouse over it  E-mail can be Base64-encoded for extra protection  Here s how   lt div id  quot contacts quot  gt Contacts lt  div gt    lt script gt    document querySelector  quot  contacts quot   addEventListener  quot mouseover quot    event    gt           Base64-encode your email and provide it as argument to atob       event target textContent   atob  aW5mb0BjbGV2ZXJpbmcuZWU           lt  script gt

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See Making email addresses safe from bots on a webpage   I like the way Facebook and others render an image of your email address   I have also used The Enkoder in the past - thought it was very good to be honest

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Does it work if I right-click on the link and choose  copy URL   If not  it s very much not an ideal situation  I very seldom click on a mailto link  preferring to copy the email address and paste it into my mail application or wherever else I need it at a specific point in time    I used to be fairly paranoid protecting my mail address on-line  UseNet  web and the like   but these days I suspect more  possible targets for spam  are actually generated matching local-parts to domains programmatically  I base this on having  on occasion  gone through my mail server logs  There tends to be quite a few delivery attempts to non-existing addresses  including truncated versions of spam-bait I dangled on UseNet back in the late 90s  when address-scraping was very prevalent

User · Answer

See Making email addresses safe from bots on a webpage   I like the way Facebook and others render an image of your email address   I have also used The Enkoder in the past - thought it was very good to be honest

User · Answer

One easy solution is to use HTML entities instead of actual characters  For example  the  me example com  will be converted into     lt a href   amp  109  amp  97  amp  105  amp  108  amp  116  amp  111  amp  58  amp  109  amp  101  amp  64  amp  101  amp  120  amp  97  amp  109  amp  112  amp  108  amp  101  amp  46  amp  99  amp  111  amp  109   gt email me lt  A gt

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First I would make sure the email address only shows when you have javascript enabled  This way  there is no plain text that can be read without javascript   Secondly  A way of implementing a safe feature is by staying away from the  lt button gt  tag  This tag needs a text insert between the tags  which makes it computer-readable  Instead try the  lt input type  button  gt  with a javascript handler for an onClick  Then use all of the techniques mentioned by otherse to implement a safe email notation   One other option is to have a button with  Click to see emailaddress   Once clicked this changes into a coded email  the characters in HTML codes   On another click this redirects to the  mailto email  function  An uncoded version of the last idea  with selectable and non-selectable email addresses    lt html gt   lt body gt   lt script type  text javascript  gt        e1   domain         e2  me         e3   extension   email link  mailto   e2 e1 e3   lt  script gt   lt input type  text  onClick  this onClick window open email link    value  Click for mail   gt   lt input type  text  onClick  this value email   value  Click for mail-address   gt   lt input type  button  onClick  this onClick window open email link    value  Click for mail   gt   lt input type  button  onClick  this value email   value  Click for mail-address   gt   lt  body gt  lt  html gt    See if this is something you would want and combine it with others  ideas  You can never be too sure

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You can try to hide characters using html entities in hexa  ex   amp  x40 for     This is convenient solution  as a correct browser will translate it  and you can have a normal link  The drawback is that a bot can translate it theorically  but it s a bit unusual  I use this to protect my e-mail on my blog   Another solution is to use javascript to assemble part of the address and to decode on-the-fly the address  The drawback is that a javascript-disabled browser won t show your adress   The most effective solution is to use an image  but it s a pain for the user to have to copy the address by hand   Your solution is pretty good  as you only add a drawback  writing manually the    only for user that have javascript disabled  You can also be more secure with    onclick  this href  mailto      admin      amp  x40      domain com

User · Answer

Working with content and attr in CSS    x000D   x000D   cryptedmail after   x000D    content  attr data-name      attr data-domain      attr data-tld    x000D    x000D   lt a href     class  cryptedmail  x000D     data-name  info  x000D     data-domain  example  x000D     data-tld  org  x000D     onclick  window location href    mailto     this dataset name         this dataset domain         this dataset tld  return false   gt  lt  a gt  x000D   x000D   x000D    When javascript is disabled  just the click event will not work  email is still displayed   Another interesting approach  at least without a click event  would be to make use of the right-to-left mark to override the writing direction  more about this  https   en wikipedia org wiki Right-to-left mark

User · Answer

I think the only foolproof method you can have is creating a Contact Me page that is a form that submits to a script that sends to your email address   That way  your address is never exposed to the public at all   This may be undesirable for some reason  but I think it s a pretty good solution   It often irks me when I m forced to copy paste someone s email address from their site to my mail client and send them a message  I d rather do it right through a form on their site   Also  this approach allows you to have anonymous comments sent to you  etc   Just be sure to protect your form using some kind of anti-bot scheme  such as a captcha   There are plenty of them discussed here on SO

User · Answer

Another option  I perefer font awesome icons  Fa implementation    lt link rel  stylesheet  href  path to font-awesome css font-awesome min css  gt    Mail Address    lt a href  mailto info uploadimage club  gt  lt span class  label  gt info lt i class  fa fa-at  gt  lt  i gt uploadimage club lt  span gt  lt  a gt

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I like ofaurax s answer best but I would modify to this for a little more hidden email   onclick  p1  admin   p2  domain com   this href  mailto     p1     amp   x40     p2

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after using so many techniques i found an easy way and very friendly  the bots search for   S  mbolo and recently they search for  at  ant it s variation so i use 2 techniques   i write my email on an image like the domaintolls use and it works perfectly or to replace the S  mbolo     with an image of it like    and the image alt will be alt     so the bot will find an image and any human will see it as a normal address so if he copy it he will copy the email and the job is don so the code will be    lt p gt myname lt img src  http   www traidnt net vb images mail2 gif  width  11  height  9  alt       gt domain com lt  p gt

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First I would make sure the email address only shows when you have javascript enabled  This way  there is no plain text that can be read without javascript   Secondly  A way of implementing a safe feature is by staying away from the  lt button gt  tag  This tag needs a text insert between the tags  which makes it computer-readable  Instead try the  lt input type  button  gt  with a javascript handler for an onClick  Then use all of the techniques mentioned by otherse to implement a safe email notation   One other option is to have a button with  Click to see emailaddress   Once clicked this changes into a coded email  the characters in HTML codes   On another click this redirects to the  mailto email  function  An uncoded version of the last idea  with selectable and non-selectable email addresses    lt html gt   lt body gt   lt script type  text javascript  gt        e1   domain         e2  me         e3   extension   email link  mailto   e2 e1 e3   lt  script gt   lt input type  text  onClick  this onClick window open email link    value  Click for mail   gt   lt input type  text  onClick  this value email   value  Click for mail-address   gt   lt input type  button  onClick  this onClick window open email link    value  Click for mail   gt   lt input type  button  onClick  this value email   value  Click for mail-address   gt   lt  body gt  lt  html gt    See if this is something you would want and combine it with others  ideas  You can never be too sure

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Spambots won t interpret this  because it is a lesser-known method     First  define the css   email before       content   admin      email after       content    example com       Now  wherever you want to display your email  simply insert the following HTML    lt div id  email  gt  lt  div gt    And tada

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what about HTML CHARACTER    joe amp  064 mail com   outputs  joe mail com

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I know my answer won t be liked by many but please consider the points outlined here before thumbing down   Anything easily machine readable will be easily machine readable by the spammers  Even though their actions seem stupid to us  they re not stupid people  They re innovative and resourceful  They do not just use bots to harvest e-mails  they have a plethora of methods at their disposal and in addition to that  they simply pay for good fresh lists of e-mails  What it means is  that they got thousands of black-hat hackers worldwide to execute their jobs  People ready to code malware that scrape the screens of other peoples  browsers which eventually renders any method you re trying to achieve useless  This thread has already been read by 10  such people and they re laughing at us  Some of them may be even bored to tears to find out we cannot put up a new challenge to them   Keep in mind that you re not eventually trying to save your time but the time of others  Because of this  please consider spending some extra time here  There is no easy-to-execute magic bullet that would work  If you work in a company that publishes 100 peoples  e-mails on the site and you can reduce 1 spam e-mail per day per person  we re talking about 36500 spam emails a year  If deleting such e-mail takes 5 seconds on average  we re talking about 50 working hours yearly  Not to mention the reduced amount of annoyance  So  why not spend a few hours on this   It s not only you and the people who receive the e-mail that consider time an asset  Therefore  you must find a way to obfuscate the e-mail addresses in such way  that it doesn t pay off to crack it  If you use some widely used method to obfuscate the e-mails  it really pays off to crack it  Since as an result  the cracker will get their hands on thousands  if not tens or hundreds of thousands of fresh e-mails  And for them  they will get money   So  go ahead and code your own method  This is a rare case where reinventing the wheel really pays off  Use a method that is not machine readable and one which will preferably require some user interaction without sacrificing the user experience   I spent some 20 minutes to code off an example of what I mean  In the example  I used KnockoutJS simply because I like it and I know you won t probably use it yourself  But it s irrelevant anyway  It s a custom solution which is not widely used  Cracking it won t pose a reward for doing it since the method of doing it would only work on a single page in the vast internet   Here s the fiddle  http   jsfiddle net hzaw6   The below code is not meant to be an example of good code  But just a quick sample of code which is very hard for machine to figure out we even handle e-mails in here  And even if it could be done  it s not gonna pay off to execute in large scale   And yes  I do know it doesn t work on IE   lte8 because of  Unable to get property  attributes  of undefined or null reference  but I simply don t care because it s just a demo of method  not actual implementation  and not intended to be used on production as it is  Feel free to code your own which is cooler  technically more solid etc     Oh  and never ever ever name something mail or email in html or javascript  It s just way too easy to scrape the DOM and the window object for anything named mail or email and check if it contains something that matches an e-mail  This is why you don t want any variables ever that would contain e-mail in it s full form and this is also why you want user to interact with the page before you assign such variables  If your javascript object model contains any e-mail addresses on DOM ready state  you re exposing them to the spammers   The HTML    lt div data-bind  foreach  contacts  gt       lt div class  contact  gt           lt div gt               lt h5 data-bind  text  firstName         lastName           department  gt  lt  h5 gt               lt ul gt                   lt li gt Phone   lt span data-bind  text  phone  gt  lt  span gt  lt  li gt                   lt li gt  lt a href   999  data-bind  click  root reveal  gt E-mail lt  a gt   lt span data-bind  visible   root msgMeToThis          gt  lt input class  merged  data-bind  value  mPrefix  readonly  readonly    gt  lt span data-bind  text        domain  gt  lt  span gt  lt  span gt  lt  li gt               lt  ul gt           lt  div gt       lt  div gt   lt  div gt    The JS  function ViewModel        var self   this       self contacts   ko observableArray             firstName  John   mPrefix   john doe   domain   domain com   lastName   Doe   department   Sales   phone    358 12 345 6789               firstName  Joe   mPrefix   joe w   domain   wonder com   lastName   Wonder   department   Time wasting   phone    358 98 765 4321               firstName  Mike   mPrefix   yo   domain   rappin com   lastName   Rophone   department   Audio   phone    358 11 222 3333                self msgMeToThis   ko observable          self reveal   function m  e           var name   e target attributes href value          name   name replace                   self msgMeToThis name            var viewModel   new ViewModel    ko applyBindings viewModel

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If you have php support  you can do something like this     lt img src  scriptname php  gt    And the scriptname php    lt  php header  Content-type  image png       Your email address which will be shown in the image  email          you yourdomain com    length          strlen  email  8    im    ImageCreate   length  20       or die   Kann keinen neuen GD-Bild-Stream erzeugen     background color   ImageColorAllocate   im  255  255  255      White  255 255 255  text color   ImageColorAllocate   im  55  103  122   imagestring  im  3 5 2  email   text color   imagepng   im     gt

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One of my favorite methods is to obfuscate the email address using php  a classic example is to convert the characters to HEX values like so   function myobfiscate  emailaddress     email   emailaddress                    length   strlen  email                             for   i   0   i  lt   length   i                       obfuscatedEmail      amp      ord  email  i            echo  obfuscatedEmail      And then in my markup I ll simply call it as follows      lt a href  mailto  lt  php echo myobfiscate  someone somewhere com      gt   title  Email me   gt  lt  php echo myobfiscate  someone somewhere com     gt   lt  a gt    Then examine your source  you ll be pleasantly surprised

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I know my answer won t be liked by many but please consider the points outlined here before thumbing down   Anything easily machine readable will be easily machine readable by the spammers  Even though their actions seem stupid to us  they re not stupid people  They re innovative and resourceful  They do not just use bots to harvest e-mails  they have a plethora of methods at their disposal and in addition to that  they simply pay for good fresh lists of e-mails  What it means is  that they got thousands of black-hat hackers worldwide to execute their jobs  People ready to code malware that scrape the screens of other peoples  browsers which eventually renders any method you re trying to achieve useless  This thread has already been read by 10  such people and they re laughing at us  Some of them may be even bored to tears to find out we cannot put up a new challenge to them   Keep in mind that you re not eventually trying to save your time but the time of others  Because of this  please consider spending some extra time here  There is no easy-to-execute magic bullet that would work  If you work in a company that publishes 100 peoples  e-mails on the site and you can reduce 1 spam e-mail per day per person  we re talking about 36500 spam emails a year  If deleting such e-mail takes 5 seconds on average  we re talking about 50 working hours yearly  Not to mention the reduced amount of annoyance  So  why not spend a few hours on this   It s not only you and the people who receive the e-mail that consider time an asset  Therefore  you must find a way to obfuscate the e-mail addresses in such way  that it doesn t pay off to crack it  If you use some widely used method to obfuscate the e-mails  it really pays off to crack it  Since as an result  the cracker will get their hands on thousands  if not tens or hundreds of thousands of fresh e-mails  And for them  they will get money   So  go ahead and code your own method  This is a rare case where reinventing the wheel really pays off  Use a method that is not machine readable and one which will preferably require some user interaction without sacrificing the user experience   I spent some 20 minutes to code off an example of what I mean  In the example  I used KnockoutJS simply because I like it and I know you won t probably use it yourself  But it s irrelevant anyway  It s a custom solution which is not widely used  Cracking it won t pose a reward for doing it since the method of doing it would only work on a single page in the vast internet   Here s the fiddle  http   jsfiddle net hzaw6   The below code is not meant to be an example of good code  But just a quick sample of code which is very hard for machine to figure out we even handle e-mails in here  And even if it could be done  it s not gonna pay off to execute in large scale   And yes  I do know it doesn t work on IE   lte8 because of  Unable to get property  attributes  of undefined or null reference  but I simply don t care because it s just a demo of method  not actual implementation  and not intended to be used on production as it is  Feel free to code your own which is cooler  technically more solid etc     Oh  and never ever ever name something mail or email in html or javascript  It s just way too easy to scrape the DOM and the window object for anything named mail or email and check if it contains something that matches an e-mail  This is why you don t want any variables ever that would contain e-mail in it s full form and this is also why you want user to interact with the page before you assign such variables  If your javascript object model contains any e-mail addresses on DOM ready state  you re exposing them to the spammers   The HTML    lt div data-bind  foreach  contacts  gt       lt div class  contact  gt           lt div gt               lt h5 data-bind  text  firstName         lastName           department  gt  lt  h5 gt               lt ul gt                   lt li gt Phone   lt span data-bind  text  phone  gt  lt  span gt  lt  li gt                   lt li gt  lt a href   999  data-bind  click  root reveal  gt E-mail lt  a gt   lt span data-bind  visible   root msgMeToThis          gt  lt input class  merged  data-bind  value  mPrefix  readonly  readonly    gt  lt span data-bind  text        domain  gt  lt  span gt  lt  span gt  lt  li gt               lt  ul gt           lt  div gt       lt  div gt   lt  div gt    The JS  function ViewModel        var self   this       self contacts   ko observableArray             firstName  John   mPrefix   john doe   domain   domain com   lastName   Doe   department   Sales   phone    358 12 345 6789               firstName  Joe   mPrefix   joe w   domain   wonder com   lastName   Wonder   department   Time wasting   phone    358 98 765 4321               firstName  Mike   mPrefix   yo   domain   rappin com   lastName   Rophone   department   Audio   phone    358 11 222 3333                self msgMeToThis   ko observable          self reveal   function m  e           var name   e target attributes href value          name   name replace                   self msgMeToThis name            var viewModel   new ViewModel    ko applyBindings viewModel

User · Answer

I just have to provide an another answer  I just came up with something fun to play with   I found out that in many common character tables  the letters   and a-z reappear more than once  You can map the original characters to the new mappings and make it harder for spam bots to figure out what the e-mail is   If you loop through the string  and get the character code of a letter  then add 65248 to it and build a html entity based on the number  you come up with a human readable e-mail address    var str    john doe email com   str   str toLowerCase   replace      a-z  gi  function match  position  str       var num   str charCodeAt position       return    amp       num   65248                Here is a working fiddle  http   jsfiddle net EhtSC 8   You can improve this approach by creating a more complete set of mappings between characters that look the same  But if you copy paste the e-mail to notepad  for example  you get a lot of boxes   To overcome some of the user experience issues  I created the e-mail as link  When you click it  it remaps the characters back to their originals   To improve this  you can create more complex character mappings if you like  If you can find several characters that can be used for example in the place of  a  why not randomly mapping to those   Probably not the most secure approach ever but I really had fun playing around with it  D

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