Fast and quick browsing, with few features & easy shell integratoin.

Simple Viewer

• Xviewer (linux mint default)
  • forked from Eye of gnome 3.14
  • Does not officialy support JPEG XL (yet) - but due to architecture it’s just a matter of mime/type config in linuxmint 21 (add it as application to view .jxl file)

Simple Editor

• Geeqie
  • JXL support
  • Comments and Exif information browsing and editing
• Pix - very similar to gThumb - JXL support is blocky as of v3.0.2
• gThumb: crop, rotate
• Gwenview
• Pinta - Paint style

see also

• Which apps support to open and convert JPEG XL (.jxl) pictures?
• digiKam - for a picasa alternative