Images can t contain alpha channels or transparencies

Question

Apple has released new version of iTunes Connect  amp  I got an error message when I tried to set Screenshots on itunes connect for my app    Images can t contain alpha channels or transparencies

User · Answer

Faced same issue  Try using JPG format

User · Answer

Exporting from Sketch  To avoid transparency  ensure no layer extends beyond the artboard bounds

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You can export to PNG without alpha in Preview  Simply open your image  choose export  select PNG  uncheck Alpha  and click Save  Preview also support batch export if you open all your images at once

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For this i made a new simple tool  You can remove alpha channel  transparency  of multiple  png files within seconds     You can download from  here  http   alphachannelremover blogspot com

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You can simply create a new Photoshop document and  set its default background to White instead of Transparent  Then  copy and paste your image to the newly created document and save it

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Photoshop   Slice it  Save for web  Uncheck Transparency

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it so easy     Open image in Preview app click File -  Export and  uncheck alpha

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Faced same issue  Try using JPG format    What worked for me here was using a jpg file instead of PNG as jpg files don t use alpha or transparency features  I did it via online image converter or you can also open the image in preview and then File- Export and uncheck alpha as option to save the image and use this image

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If you have imagemagick installed  then you can put the following alias into your  bash profile   It will convert every png in a directory to a jpg  which automatically removes the alpha   You can use the resulting jpg files as your screen shots   alias pngToJpg  for i in   png  do convert  i   i  png   jpg  done

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Still a problem in 2019      This worked for me  Select all images you want to upload -  Right click -  Open in Preview -  Export -  Uncheck alpha -  Use the exported images

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i have same problem just compress your png file on https   tinypng com  online and then try to upload that new compressed png file   its work for me

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i was able to use imageoptim to remove alpha channel and compress png files

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AFAIK png with transparency is not allowed  use jpg OR update your png  photoshop or whatever you using to create the png  and delete the transparency areas  if you work with shadows  use jpg  that will do no headaches

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Convert your PNG image to JPEG format

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Extending Roman B  answer  This is still a problem  I was uploading a cordova app  my solution using mogrify   brew install imagemagick   navigate to  platforms ios  lt your app name gt  Images xcassets AppIcon appiconset   mogrify -alpha off   png   Then archived and validated successfully

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On Pixelmator you can use  Share   Export for Web              E     and deselect Transparency in the Tool Options Bar

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If you are using Photoshop go File   Save for web  Command   Option   Shift   S   Make sure the Transparency is unchecked and this should work

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Use mogrify tool from ImageMagick package to remove alpha channel   brew install imagemagick cd folder with images mogrify -alpha off     png   Update from May 3  You can tell whether image contains alpha channel by running   sips -g all image png   In case you render screenshots in iOS Simulator you can drop alpha channel by passing BOOL opaque   YES to UIGraphicsBeginImageContextWithOptions   UIGraphicsBeginImageContextWithOptions imageSize  YES  0

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You can remove the alpha channel from a PNG file from the command line with pngcrush  using the flag  -c 2      file input png input png  PNG image data  1024 x 1024  8-bit color RGBA  non-interlaced   pngcrush -q -c 2 input png output png libpng warning  iCCP  known incorrect sRGB profile   file output png output png  PNG image data  1024 x 1024  8-bit color RGB  non-interlaced   Note the change from RGBA to RGB  the Alpha channel is gone   pngcrush lives at http   pmt sourceforge net pngcrush

User · Answer

What worked for me here was using a jpg file instead of PNG as jpg files don t use alpha or transparency features  I did it via online image converter or you can also open the image in preview and then File- Export and uncheck alpha as option to save the image and use this image

User · Answer

To get around the problem I batched converted using fireworks my png32 files to png24 for upload quick and easy  Jpeg works also but it is lossy

User · Answer

You must remove alpha channels when uploading a photo to iTunes Connect   You can do this by Preview  Photos App  old iPhoto   Pixelmator  Adobe Photoshop and GIMP  Preview  Open the photo in Preview  if the photo is in your photo album in Photos app  the old iPhoto   then simply drag it from the album to desktop  Then control-click  right-click when mouse  the duplicated photo and select Preview app under Open With menu    Select Export    under File menu  and after selecting the destination  uncheck Alpha at the bottom  and click Export      Pixelmator  Open the image in Pixelmator  without creating a new Pixelmator file  Just drag the photo to the Pixelmator window   From Share menu  click Export for Web      In the top bar  deselect Transparency   Click Next and then save the new file somewhere    Finally  upload the new photo to iTunes Connect  GIMP  Open the photo in GIMP   Open the Layer menu   Under Transparency  click Remove Alpha Channel   Save the photo    Adobe Photoshop  Open the photo in Adobe Photoshop   Under Layer menu  click Layer Mask and then From Transparency   Delete the layer mask by right-clicking on the mask in the Layer panel and selecting Delete Layer Mask

User · Answer

I ve found you can also just re-export the png s in Preview  but uncheck the Alpha checkbox when saving

[ios] Images can't contain alpha channels or transparencies

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