I made a small tool for KDE Plasma (and other freedesktop desktops) that lets you easily customize single app icons:
- Use your own images or library
- Copy icon from another app
- Pick one icon from any installed theme (without switching global theme)
- Built-in pixel editor to create your own
- Batch apply, undo, overrides, missing icons overview
- Import image to turn it into an icon
Completely user-level, safe, and reversible. No manual .desktop editing.
GitHub: https://github.com/rayman1972/kappicon
AUR: kappicon or kappicon-git
Feedback welcome!-


According to the Readme, yes.
I didn’t look too deeply, but I assume it modifies .desktop files stored in
$XDG_DATA_HOME/applications/and/or copies system.desktop files there to override them with modified versions.If it works like I assume, it should work with anything that reads .desktop files from the standard locations.