How to batch process images retaining them as PNG in Photoshop?

Question

I need to optimize 700 images in PNG in a batch process, but Photoshop only gives me the option to optimize the images and export them to JPG, when I want to mantain the images on PNG. Is there a way to do this on Photoshop or in another tool? You can see the screenshot following this link.

Answer 1

You can probably do this by creating an action and then batch processing:

Create the action

• with an open file in photoshop
• start recording
• do File > Save As > and set file type to PNG
• or use File > Save for Web if you need to resize or make other modifications
• click Save
• stop recording and save action as "Save As PNG"

(there may also be some built in actions with Photoshop, I can't remember)

Then in Adobe Bridge

• Select all the files you want
• Tools > Photoshop > Batch
• Select your "Save As PNG" action
• Click OK to process

Answer 2

You want to use ImageMagick, its free and open source. Get it from http://www.imagemagick.org/script/index.php

Then use the "convert" function

Answer 3

You can try using "save for Web & Devices"

Some helpful links:

• The Comprehensive Guide to Saving Images for the Web
• (video) Photoshop Top 40 #34 - Save for Web & Devices

I hope this helps.