JPEG XL Converter & Editor
JPEG XL (JXL) is a modern image format built for high-quality compression, lossless workflows, HDR, wide color, animation, and transparency. FastEdit can open JXL files, edit them, and export back to JXL or convert them to broader formats like JPEG, PNG, WebP, and AVIF.
JXL decoding and encoding run locally in your browser through WebAssembly, so private images stay on your device during import, editing, and export.
Codec JPEG XL (.jxl)
Color Depth Up to high bit depth / HDR depending on source and encoder settings
Animation Support Format supports animation; FastEdit handles JXL as a still-image export format today
Transparency Full alpha channel support
What it handles
- Open and decode .jxl files in the browser using FastEdit's local WebAssembly pipeline
- Export images as JPEG XL with quality and lossless controls
- Convert JXL to JPEG, PNG, WebP, or AVIF for compatibility with other apps and browsers
- Crop, resize, rotate, and compare output quality before exporting
- Batch convert JXL files with shared output settings
- Preserve transparency when exporting to formats that support alpha, including JXL, PNG, WebP, and AVIF
Where it fits
- Opening JXL files on browsers or systems that do not display them natively
- Converting JPEG XL photos to JPG or PNG for sharing with clients, CMS tools, or older software
- Exporting high-quality image masters as JXL for archival or future web delivery workflows
- Comparing JXL output against AVIF and WebP before choosing a production format
- Batch converting existing image libraries to or from JPEG XL locally
Technical Specifications
Codec JPEG XL (.jxl)
Color Depth Up to high bit depth / HDR depending on source and encoder settings
Animation Support Format supports animation; FastEdit handles JXL as a still-image export format today
Transparency Full alpha channel support
Processing Decoded and encoded client-side via WebAssembly
Typical Use High-quality compression, archival images, and next-generation image delivery
MIME Type image/jxl