Animated JXL maker
Animated JXL output:
Online animated JXL (JPEG XL) maker tool
Tool for crating JXL files from series of images or other animated image formats.
Warning: Most major web browsers (except Safari) currently do not support displaying JXL files by default, so they are unlikely to appear in your browser unless you have some special plugin or browser configuration. However, you can still generate and download the JXL file even if you don't see the preview on this page.