How do I Batch Convert JPEG to PNG files?

Didn't there used to be an option to record your actions and reuse them, just like the macro's on Excel? 

I can’t believe that IPP was not mentioned!

https://sourceforge.net/projects/ps-scripts/files/Image%20Processor%20Pro/v3_2%20betas/

The good jpg to png file converter for everyone is now JPG4PNG. I used it and felt satisfied.

Using Apple script (not Photoshop CC) to automate duplicating and changing other image formats to png:

Right click the folder

Choose "Folder Actions Setup...".

Choose "Image - Duplicate as PNG.scpt".

Click "Attach".

Drop files in the folder.

Outputs will be in "Original Images" (non-PNG files) folder or "PNG Images" (outputs) folder.

Note, if a file is misnamed ".png" and is not a .png, you can use Automator to rename .png something else before dropping them in the folder. Otherwise, the script won't pick up on .pngs that are not .pngs.

Create a Photoshop Droplet, which is a mini-app that you can drag and drop your JPG files onto to do the auto-convert to PNG. To create the Droplet app, you need to create an Action in the Actions Panel first. So open one JPG file and record an action of saving that file as a PNG. In the Action Panel, create a new Action. It will ask you to name it, try something like "PNG Convert". When you hit ok, it will begin recording. Now just save that file (Save As) a PNG. It should be set to save it in the location it was originally.

Hit Save and it will save as a PNG with the PNG file extension.

Now stop the recording in the Action Panel and close that file and any others you might have open. Now go to File > Automate > Create Droplet.

Select where you want the Droplet App saved - probably the destination folder of the files you want to convert, and name it. In the Play box, set your Set and Action. Your Set is probably the Default Set unless you created a new Action folder and the Action should be the action that you created - it may default to the one you created already. One other thing to set is the Destination to at least: Save and Close, because it is going to open each file, do its action and if you don't set close, you may end up with hundreds of open files, which will slow things down. You can see here that there are a bunch of other settings if you want to get into the weeds, but these settings will get you running.

Click OK.

Now, go to your folder that includes the jpegs and the Droplet. Select all the jpeg files and drag them onto the Droplet.

That's it. It does not overwrite the jpegs, so you may want to trash them, but you might want to open up a converted PNG just to make sure it worked ok before you do.

That's it. Hope that helps!

You can do this batch conversion through the native Preview app on Macs. Open the selected images in Preview or drag and drop them onto the Preview icon, highlight all the images, export selected images, and from there you can save as PNG or, alternatively, you can downsize the JPEGs if you want.

You could do it like this: http://www.santoshgs.com/blog/189/how-to-batch-convert-png-to-jpeg-using-photoshop-cs2/

But can I be honest? I'd do that with a more efficient and far faster conversion utility like IrfanView. Photoshop is incredibly slow for this type of work. For example, I did a quick test to demonstrate the difference in performance:

folder with 10 images in jpg format, 5600px by 5600px. Simple jpg to png batch.

Photoshop: over six minutes.

IrfanView: one minute and 40 seconds.

That's a rather big difference - and with large numbers of images I just do not have the time to wait for Photoshop to finish the job. It's too slow.

Another issue is that during the conversion process Photoshop cannot be used - while with a simple conversion utility you can leave it running in the background, and continue to use PS for other work if required. This matters if you have hundreds of images to convert.

Btw, Irfanview (windows only) is free to download @ http://www.irfanview.com/

The batch processing you can find under File-->Batch Conversion <b>

ImageMagick is also free and open source. It is a command line tool, and easy to use for conversions.Will also work on a mac. But it is much slower than IrfanView, a tad faster than PS.

http://www.imagemagick.org/script/convert.php

http://www.ofzenandcomputing.com/batch-convert-image-formats-imagemagick/

File > Scripts > Image Processor