What is JPEG XL?

JPEG XL (.jxl). Next-gen image format designed for high quality and efficient compression.

Last updated: 2026-03-18

JPEG XL (JPEG XL, .jxl) is a image format that uses both compression. Next-gen image format designed for high quality and efficient compression. It supports transparency. It supports animation. Common uses include archival, high-fidelity images, master files.

Quick facts

Extension
.jxl
Type
Image format
Compression
both
Transparency
Yes
Animation
Yes
MIME type
image/jxl

Common uses

  • archival
  • high-fidelity images
  • master files

Delivery notes

  • Great for masters and experiments.
  • For delivery, convert to WebP/AVIF/JPEG based on your constraints.

What to do with optimo

Optimize JPEG XLCompress JPEG XLResize JPEG XLConvert between formats
npx optimo image.jxl

Related conversions

Convert PNG to JPEG XLConvert JPEG to JPEG XLConvert WebP to JPEG XLConvert AVIF to JPEG XLConvert HEIC to JPEG XLConvert JPEG XL to PNGConvert JPEG XL to JPEGConvert JPEG XL to WebPConvert JPEG XL to AVIFConvert JPEG XL to HEIC

More image formats

PNGJPEGWebPAVIFHEICGIFSVG

Frequently asked questions

What is JPEG XL?
JPEG XL (.jxl) is a image format. Next-gen image format designed for high quality and efficient compression. It uses both compression, supports transparency and animation.
What is JPEG XL used for?
JPEG XL is commonly used for: archival, high-fidelity images, master files.
How do I optimize JPEG XL files?
Run "npx optimo image.jxl" in your terminal. Optimo applies format-specific compression to reduce JPEG XL file size while preserving quality.