Install draw.io Desktop on Linux Mint (should work for Debian as well):

  1. Download AppImage file from Github releases page, e.g. Release 27.0.9 · jgraph/drawio-desktop
  2. Make AppImage file executable:
    chmod u+x drawio.AppImage
    
  3. Move AppImage file to ~/.local/bin/
    mv drawio.AppImage ~/.local/bin/drawio.AppImage
    
  4. Create and edit the desktop entry file
    nano ~/.local/share/applications/appimagekit-drawio.desktop
    
  5. Add following content to the desktop entry file and save changes
    [Desktop Entry]
    Name=draw.io
    Comment=Diagramming Application
    Exec=/home/YOUR_USERNAME/.local/bin/appimagekit-drawio.AppImage
    Icon=com.jgraph.drawio.desktop
    Terminal=false
    Type=Application
    Categories=Graphics;
    
  6. Update the desktop database
    xdg-desktop-menu install ~/.local/share/applications/appimagekit-drawio.desktop 
    
  7. draw.io should appear in Linux Mint start menu under “Graphics”