Remove transparency in bulk - GIMP

Question

I have 3,337 PNG images which all have a transparent background.

First of all, I don't know how to remove transparency...

Second of all, I want to do this with all 3,337 images at the same time.

I might as well kill two birds with one stone: How do I remove transparency from PNG images in GIMP in bulk (multiple items at the same time)?

Answer 1

If you want to remove transparency as part of the background you will want to batch/group convert the png file to jpg. You can find some online programs that will can do this by selecting your directory and choosing the export file.

Try a bulk image convertor http://sourceforge.net/projects/bulkimageconver/

For GIMP: GIMP has a batch mode, I am not experience in this feature but you can find a tutorial on their website and around the web. http://www.gimp.org/tutorials/Basic_Batch/

However you don't necessarily need gimp to batch convert the images.

You can also create an action in Photoshop to do by creating a save for web action and choose jpg as the file type. You can also do this in Lightroom by exporting your library as jpg.

Answer 2

• PNG files support transparency

• JPEG files do not support transparency

• Changing your files to JPEG will remove the background transparency

Step 1 - Select all of your images,and open with this batch image convertor.

Step 2 - Convert to JPEG using the maximum quality setting.

You will now have a JPEG version of each image in the folder (with a white background).

If you specifically want to use GIMP (batch mode) you will need a script to automate the process for you. You can save each image as a JPEG or else flatten each image to remove the alpha channel (transparency).