Regex for password must contain at least eight characters at least one number and both lower and uppercase letters and special characters

Question

I want a regular expression to check that   A password contains at least eight characters  including at least one number and  includes both lower and uppercase letters and special characters  for example           It cannot be your old password or contain your username   password   or  websitename   And here is my validation expression which is for eight characters including one uppercase letter  one lowercase letter  and one number or special character         8           d        W         n        A-Z        a-z         How can I write it for a password must be eight characters including one uppercase letter  one special character and alphanumeric characters

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You can use the below regular expression pattern to check the password whether it matches your expectations or not           d       a-z        A-Z                amp        8 20

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A-Z        a-z        0-9        this the simple way to use it while validate atleast 1 uppercase 1 lowercase and 1 number and this is the example while I use in express validation check  password        notEmpty        withMessage  Password cannot be null        bail        isLength   min  6         withMessage  Password must be at least 6 characters        bail        matches         A-Z        a-z        0-9             withMessage         Must have atleast 1 uppercase  1 lowercase letter and 1 number

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I ve actually just copied the first answer here and turned it into a more ux-convenient regex which needs one upper  one lower and at least 8 chars but accepts everything  in between    This one is an example-regex which requires   at least 8 characters length at least one lowercase letter at least one uppercase letter   IMPORTANT  This regex will also except all other characters e g  numbers  special characters like       etc  - as long as the rules 1  to 3  match the input string         a-z        A-Z    8      Mind the     alomst at the end of the regex  This will match almost any  and afaik any readable  character

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0-9        a-z        A-Z              amp  -    6

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In Java Android  to test a password with at least one number  one letter  one special character in following pattern           A-Za-z         d                amp    A-Za-z  d         amp   8

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What about considering the following regex solution           w         W    w W  8     Which validates the following    At least one lowercase At least one uppercase At least one digit At least one special character At least it should have 8 characters long    Check it out working at the following link https   regex101 com r qPmC06 4

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Just we can do this by using HTML5   Use below code in pattern attribute   pattern        8           d       W         n        A-Z        a-z         It will work perfectly

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This worked for me         0-9        a-z        A-Z               amp     a-zA-Z0-9       amp   8       At least 8 characters long  One lowercase  one uppercase  one number and one special character  No whitespaces

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Just a small improvement for  anubhava s answer  Since special character are limited to the ones in the keyboard  use this for any special character           A-Z         a-z   1           d   1           W   1         s   8     This regex will enforce these rules    At least one upper case English letter At least one lower case English letter At least one digit At least one special character Minimum eight in length

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Use the following Regex to satisfy the below conditions    Conditions  1  Min 1 special character              2  Min 1 number              3  Min 8 characters or More      Regex         d             amp      A-Za-z d      amp     8         Can Test Online  https   regex101 com

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Use the following Regex to satisfy the below conditions  Conditions   Min 1 uppercase letter  Min 1 lowercase letter  Min 1 special character  Min 1 number  Min 8 characters  Max 30 characters   Regex          a-z        A-Z        d             amp      A-Za-z d      amp     8 30

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var strongRegex   new RegExp  quot        a-z        A-Z        0-9                 amp          8    quot    var mediumRegex   new RegExp  quot          a-z        A-Z           a-z        0-9           A-Z        0-9         6    quot     Best For javascript

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According to your need this pattern should work just fine  Try this           d  1      S       a-zA-Z S   0-9a-zA-Z S  8     Just create a string variable  assign the pattern  and create a boolean method which returns true if the pattern is correct  else false   Sample   String pattern            d  1      S       a-zA-Z S   0-9a-zA-Z S  8     String password string    Type the password here   private boolean isValidPassword String password string        return password string matches Constants passwordPattern

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A more  generic  version     allowing none English letters as special characters        S  a-z      S  A-Z      S  d     S    w s   S 8       x000D   x000D  var pwdList     x000D         V4- 3Z zTzM  gt k   x000D       12qw  QW12   x000D       123qweASD      x000D       1qA      amp    x000D       G  nther32   x000D       123456789   x000D       qweASD123   x000D       qweqQWEQWEqw   x000D       12qwAS   x000D       x000D    re         S  a-z      S  A-Z      S  d     S    w s   S 8      x000D     x000D    pwdList forEach function  pw    x000D      document write   lt span style  color     re test pw     green   red        gt     pw     lt  span gt  lt br  gt     x000D        x000D   x000D   x000D

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I would reply to Peter Mortensen  but I don t have enough reputation   His expressions are perfect for each of the specified minimum requirements  The problem with his expressions that don t require special characters is that they also don t ALLOW special characters  so they also enforce maximum requirements  which I don t believe the OP requested  Normally you want to allow your users to make their password as strong as they want  why restrict strong passwords   So  his  minimum eight characters  at least one letter and one number  expression          A-Za-z        d  A-Za-z d  8     achieves the minimum requirement  but the remaining characters can only be letter and numbers  To allow  but not require  special characters  you should use something like          A-Za-z        d   8    to allow any characters  or         A-Za-z        d  A-Za-z d         amp   8    to allow specific special characters  Likewise   minimum eight characters  at least one uppercase letter  one lowercase letter and one number           a-z        A-Z        d  a-zA-Z d  8     meets that minimum requirement  but only allows letters and numbers  Use          a-z        A-Z        d   8    to allow any characters  or         a-z        A-Z        d  A-Za-z d        amp   8   to allow specific special characters

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Try this one    Minimum six characters At least one uppercase character At least one lowercase character At least one special character   Expression            a-z        A-Z        d               amp     A-Za-z d        amp    6  20      Optional Special Characters    At least one special character At least one number Special characters are optional Minimum six characters and maximum 16 characters   Expression            d       a-zA-Z    6 20       If the min and max condition is not required then remove   6  16    6 is minimum character limit 20 is maximum character limit    means match expression

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Minimum eight characters  at least one letter and one number           A-Za-z        d  A-Za-z d  8       Minimum eight characters  at least one letter  one number and one special character           A-Za-z        d               amp    A-Za-z d        amp   8       Minimum eight characters  at least one uppercase letter  one lowercase letter and one number           a-z        A-Z        d  a-zA-Z d  8       Minimum eight characters  at least one uppercase letter  one lowercase letter  one number and one special character           a-z        A-Z        d              amp    A-Za-z d       amp   8       Minimum eight and maximum 10 characters  at least one uppercase letter  one lowercase letter  one number and one special character           a-z        A-Z        d              amp    A-Za-z d       amp   8 10

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I ve found many problems here  so I made my own   Here it is in all it s glory  with tests           a-z        A-Z        d         a-zA-Z d s     9      https   regex101 com r DCRR65 4 tests  Things to look out for    doesn t use  w because that includes    which I m testing for  I ve had lots of troubles matching symbols  without matching the end of the line  Doesn t specify symbols specifically  this is also because different locales may have different symbols on their keyboards that they may want to use

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Use this          d       a-z        A-Z                 amp     8 20     It will validate for at least one lowercase  one upper case  one number and the special charecters of                   amp     Minimum length is 8 and maximum length is 20

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ClasG has already suggested        S  a-z      S  A-Z      S  d     S    w s   S 8      but it does not accept   underscore  as a special character  eg  Aa12345     An improved one is        S  a-z      S  A-Z      S  d     S     w s        S 8

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Not directly answering the question  but does it really have to be a regex   I used to do lots of Perl  and got used to solving problems with regexes  However  when they get more complicated with all the look-aheads and other quirks  you need to write dozens of unit tests to kill all those little bugs   Furthermore  a regex is typically a few times slower than an imperative or a functional solution   For example  the following  not very FP  Scala function solves the original question about three times faster than the regex of the most popular answer  What it does is also so clear that you don t need a unit test at all   def validatePassword password  String   Boolean       if  password length  lt  8      return false    var lower   false   var upper   false   var numbers   false   var special   false    password foreach   c   gt      if  c isDigit        numbers   true     else if  c isLower   lower   true     else if  c isUpper   upper   true     else                 special   true        lower  amp  amp  upper  amp  amp  numbers  amp  amp  special

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You may use this regex with multiple lookahead assertions  conditions            A-Z         a-z         0-9                 amp  -    8      This regex will enforce these rules    At least one upper case English letter         A-Z   At least one lower case English letter         a-z   At least one digit         0-9   At least one special character                 amp  -   Minimum eight in length   8    with the anchors

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Testing this one in 2020          a-z        A-Z        d              amp    A-Za-z d       amp   8      Verify yourself   x000D   x000D  const regex           a-z        A-Z        d              amp    A-Za-z d       amp   8      x000D  const str    some12 Nuts   x000D  let m  x000D   x000D  if   m   regex exec str       null    x000D         The result can be accessed through the  m -variable  x000D      m forEach  match  groupIndex    gt    x000D          console log  Found match  group   groupIndex     match     x000D          x000D    x000D   x000D   x000D

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Pattern to match at least 1 upper case character  1 digit and any special characters and the length between 8 to 63   quot        a-z        A-Z         d  a-zA-Z  d  W  8 63   quot   This pattern was used for JAVA programming

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A-Z        a-z        0-9               amp                quot -    8

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a-z        A-Z        d  a-zA-Z d  8      Link check online https   regex101 com r mqGurh 1

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var value    quot  password quot   val           validator addMethod  quot strongePassword quot  function value                   return    A-Za-z0-9  quot     amp       -     lt   gt                  test value   amp  amp    a-z   test value   amp  amp    d  test value   amp  amp    A-Z   test value  amp  amp    A-Z   test value   enter code here          Password must have minimum 9 characters and contain at least 1 UPPERCASE  1 lower case  1 number  1 special character

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Regular expressions don t have an AND operator  so it s pretty hard to write a regex that matches valid passwords  when validity is defined by something AND something else AND something else     But  regular expressions do have an OR operator  so just apply DeMorgan s theorem  and write a regex that matches invalid passwords   Anything with less than eight characters OR anything with no numbers OR anything with no uppercase OR or anything with no lowercase OR anything with no special characters   So       0 7    0-9     A-Z     a-z    a-zA-Z0-9       If anything matches that  then it s an invalid password

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Hope the below works  I tried this in Azure custom policy         a-z        A-Z        d             amp amp   -                   amp quot         A-Za-z d      amp amp   -                   amp quot                6 16

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Try this           8         a-z        A-Z              amp      a-zA-Z0-9      amp         This regular expression works for me perfectly   function myFunction         var str    c1TTTTaTTT        var patt   new RegExp          8         a-z        A-Z              amp      a-zA-Z0-9      amp              var res   patt test str       console log  Is regular matches    res

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Import the JavaScript file jquery validate min js   You can use this method     validator addMethod  pwcheck   function  value        return               amp                test value   amp  amp    a-z   test value   amp  amp    0-9   test value   amp  amp    A-Z   test value         At least one upper case English letter At least one lower case English letter At least one digit At least one special character

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Demo    x000D   x000D  function password check     x000D    pass   document getElementById  password   value  x000D    console log pass   x000D    regex           a-z        A-Z        d              amp    A-Za-z d       amp   8      x000D    if  regex exec pass     null    x000D      alert  invalid password    x000D      x000D    else   x000D      console log  valid    x000D      x000D    x000D   lt input type  text  id  password  value  Sample 1  gt  x000D   lt input type  button  id  submit  onclick  password check    value  submit  gt  x000D   x000D   x000D

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A solution I found in one of the previous answer as    Minimum 8 characters at least 1 Uppercase Alphabet  1 Lowercase Alphabet  1 Number and 1 Special Character           a-z        A-Z        d               amp    A-Za-z d        amp   8          didn t work for me  but the following is a simplified version and works great  add any special character you like  I added   here   and add the number rule as you do with the letters as           a-z        A-Z        0-9                amp    8

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Must contain at least 1 number  1 uppercase  1 lowercase letter and at least 8 or more characters  https   www w3schools com howto howto js password validation asp    pattern        d       a-z        A-Z    8

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I had some difficulty following the most popular answer for my circumstances  For example  my validation was failing with characters such as   or    I was not interested in white-listing my special characters  so I instead leveraged    w s  as a test - simply put - match non word characters  including numeric  and non white space characters  To summarize  here is what worked for me      at least 8 characters at least 1 numeric character at least 1 lowercase letter  at least 1 uppercase letter  at least 1 special character              A-Z         a-z         0-9           w s    8       JSFiddle Link - simple demo covering various cases

[javascript] Regex for password must contain at least eight characters, at least one number and both lower and uppercase letters and special characters

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