Which apps support to open and convert JPEG XL (.jxl) pictures?

JPEG XL (.jxl) is the next-generation, general-purpose image compression codec by the JPEG committee (more info you can find on jpegxl.info). Which apps/programs can open and convert it?

Solution 1:

So far following apps support JPEG XL:

Viewers:

• Geeqie – Recent commit adds JPEG XL support.

• gThumb (Linux image viewer) from version 3.11.3 onwards as Flatpak or with unofficial UbuntuHandbook PPA:

  sudo add-apt-repository ppa:ubuntuhandbook1/apps

• XnView MP – closed-source image viewer (but up to 0.99.1 JXL support limited to Windows)

• Gwenview (KDE Application)

• PhotoQt Image Viewer

• nomacs - Image Lounge

• qimgv - Image viewer. Fast, easy to use. Optional video support.

• Qt plug-in qt-jpegxl-image-plugin to allow Qt and KDE based applications to read/write JXL images.

Browsers with activation:

• Firefox (see Tutorial), Chrome, Edge, Opera

Converters:

• libjxl – JPEG XL Reference implementation
• MConverter – online media converter
• Squoosh – WebAssembly-based image converter
• jpegxl.io

Other:

• ExifTool – Official JPEG XL support added in version 12.25.
• GIMP – The libjxl repository includes a plugin for 2.10. There is another plugin in development for 2.99.
• ImageMagick – toolkit for raster graphics processing