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!-

    • rayman30@lemmy.worldOPEnglish
      1·
      2 days ago

      It works partially with Flatpaks on XFCE (or any desktop)

      It can change the icon for the Flatpak launcher that appears in your menu. It edits the user .desktop file that Flatpak generates (usually in ~/.local/share/applications/).

      However, Flatpaks are sandboxed, so changing the icon inside the Flatpak itself (what you see when the app is running) is not possible with this tool — that would require modifying the Flatpak bundle.

      So: menu/panel icon = yes. In-app icon = no.

        • rayman30@lemmy.worldOPEnglish
          1·
          2 days ago

          Unfortunately that’s not possible with this tool (and not really recommended). Flatpaks are sandboxed and their bundles are read-only by design. Modifying them directly would break the sandbox and cause update problems. What kAppIcon can do is change the launcher icon that appears in your menu and panel for the Flatpak, that works fine. If you want to change the icon inside the running Flatpak app, you’d need a different approach (like runtime overrides or repackaging the Flatpak), which is outside the scope of this tool.