How do I save a PNG file with an alpha channel in Photoshop CS5?

Forum|Forum|12 years ago
August 22, 2013
3 replies
110566 views

I have a PNG file created in Photoshop and I need to save it with an alpha channel for web purposes. I tried 'Save for Web & Devices' and selecting the Transparent box. Then, after saving, when I select 'get info' for the file it says there is no alpha channel. I'm stumped I can't seem to create an alpha channel from within Photoshop while I'm editing. Help!

Correct answer Willi Adelberger

PNG does not support alpha channels, only alpha transparency when you save it as PNG24. If you need to have Alpha channels in Photoshop you have to save as PSD.

P

Philip25697023ry6h

Participant

For anyone stumbling across this high-pagerank answer when trying (in vain) to get Photoshop to correctly save alpha channels in PNG files, there is a great open-source plugin that allows for reading and writing of PNG alpha as either transparency OR alpha channels.

nad33m

Participant

If you save as a 24bit png with transparent checked photoshop will save the png with transparent background (ie alpha transparency). The png will appear transparent in a web browser.

Willi Adelberger

Correct answer

Community Expert

PNG does not support alpha channels, only alpha transparency when you save it as PNG24. If you need to have Alpha channels in Photoshop you have to save as PSD.

A

Anonymous

Thanks very much! All sorted

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