Modern FormatSince 2021

JPEG XL

JPEG XL

Extension
.jxl
Developer
JPEG
Compression
Lossy
Year
2021

What is JPEG XL?

JPEG XL is a next-generation image format designed to replace both JPEG and PNG. It offers superior compression performance, supports both lossy and lossless modes, transparency, animation, progressive decoding, and can even losslessly recompress existing JPEG files for up to 20% savings. JPEG XL is designed to be the universal image format for the future, with excellent encoding speed and features.

Key Features

Lossy Compression
Smaller files, some quality trade-off
Transparency
Supports alpha channel
Animation
Supports animated images

Common Use Cases

Web image delivery (next-generation)
Photography and image archival
Lossless recompression of existing JPEG libraries
High-quality print workflows
Responsive image delivery with progressive decoding
Animated content (replacing GIF and APNG)

Advantages

  • Best overall compression across lossy and lossless
  • Can losslessly transcode existing JPEG files (20% savings)
  • Fast encoding and decoding
  • Supports transparency, animation, and HDR
  • Progressive decoding for fast previews
  • Royalty-free and open-source

Limitations

  • Very limited browser support (removed from Chrome/Firefox experiments)
  • Ecosystem and tooling still maturing
  • Adoption uncertain due to browser vendor decisions
  • Not yet widely supported in image editors
  • Competing with established formats like AVIF and WebP

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