Packaging

Optimizing Your App Icon

There are several things you can do to shrink down the size of your icon:

• save without thumbnail image (in gimp it can be done in the export dialog)
• shrink the image resolution (256px are enough, in some cases 128px or even lower like 64px can sufice)
• change your PNG colors from RGB to Indexed (in gimp Image -> Mode -> Indexed, see https://docs.gimp.org/en/gimp-image-convert-indexed.html)

For png you can also use the oxipng tool (https://github.com/shssoichiro/oxipng), which automagically optimizes your icon's file size without quality loss:

oxipng icon.png -s -o max

If you have png files in your project, you should also do this them to safe even more bytes.

Noteworthy parameters:

• --pretend only calculates gains
• -Z even more compression, but takes longer
• for more info see oxipng --help# Troubleshooting