What is Geeqie?
The Geeqie program is an open-source freeware image viewer and image organizer for Unix-based systems, including Linux and Apple's OS X. It was initially developed as a fork of GQview, which had ceased development. The application uses the GTK toolkit. Geeqie has many features focused on speed and organizing. A high-speed preview for many formats is supported. Geeqie allows Easy tagging by editing and viewing comments and EXIF data.
Geeqie JXL support
Geeqie fully supports JPEG XL. You can easily view and edit any JPEG XL image as you would do with any other image format. You can download Geeqie on its official homepage.