JPEG XL
JPEG XL is a next-generation image codec designed to replace JPEG with superior compression and modern features. It supports both lossy and lossless compression, HDR, animation, and can losslessly transcode existing JPEG files. JPEG XL offers progressive decoding and responds to bandwidth constraints in real time.
MIME Type
image/jxl
Type
Binary
Compression
Lossy
Advantages
- + Superior compression for both lossy and lossless
- + Lossless JPEG recompression saves 20%
- + Progressive decoding and HDR support
- + Royalty-free with ISO standardization
Disadvantages
- − Chrome removed support (Chromium flag only)
- − Limited browser and tooling support
- − Slow adoption due to Chrome's decision
When to Use .JXL
Use JPEG XL for archival storage and forward-looking web projects. Lossless JPEG recompression provides immediate storage savings.
Technical Details
JPEG XL uses variable-size DCT, advanced entropy coding, and modular transforms. It supports up to 32-bit floating point, 4100+ channels, and lossless JPEG recompression saving ~20%.
History
JPEG XL was developed by the JPEG committee, combining Google's PIK and Cloudinary's FUIF proposals. It was standardized as ISO/IEC 18181 in 2022.