Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I recently discovered something that I previous thought was impossible: PNG-8 files can store Alpha Transparency in the same way as PNG-32 files can. Not Indexed Transparency (like GIFs), but full on Alpha Transparency.

(You can learn more about this here: http://blogs.sitepoint.com/png8-the-clear-winner)

Apparently it's possible to do this using Fireworks, but I can't find a way to do it using Photoshop.

Does anyone know a way of enabling this incredible feature in Photoshop? Through add-ons or by any other means? It's so incredibly useful for web developers that I can't believe it's not been included in the latest version (or any version) of PS!

share|improve this question
2  
Photoshop and PNG-8 hate each other. Just thought you should know. –  Ignacio Vazquez-Abrams May 17 '11 at 21:00
    
@Ignacio: lol :) –  Mehrdad May 21 '11 at 7:41

4 Answers 4

You can use Ethan Gardner's pngquant script to convert a photoshop file to alpha-tx PNG. It works on Mac and PC. http://www.ethangardner.com/articles/alpha-transparency-in-png-8-images-without-using-fireworks/

share|improve this answer
    
This may be the best option available today. Such a shame, but thanks. –  Django Reinhardt Oct 3 '11 at 0:31

This is an important subject, especially for web design. A big png24 image can be ~1mb, almost impossible to consider for web site design use. But same image as png8 with alpha is ~250kb, ok in a lot of situations.

And finally a drag-and-drop solution for png8 with alpha transparency, free as of 2013 04: http://tinypng.org/

And some more related tools are here: http://pngquant.org/

Enjoy!

share|improve this answer

Not that I know of, but save the image as PNG-24 then use this:

http://compresspng.com

(I tried http://www.8bitalpha.com and http://tinypng.org but they gave me poor results.)

share|improve this answer
    
Seems a lot slower than 8bitalpha and tinypng, but good for control, thanks. –  Django Reinhardt Oct 3 '13 at 16:42

go to file > save for web and device

look at right side there is a drop down after Preset you'll find there PNG 8 there are some option related to transparency,just check them out.

share|improve this answer
    
Yes. Those options are for indexed transparency. My question was about alpha transparency. –  Django Reinhardt May 23 '11 at 0:09

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.