JPEG XL
A modern image format standardized by the JPEG committee for high-quality lossy and lossless compression, HDR, alpha transparency, animation, and efficient recompression of JPEG images.
General information
- Format name
- JPEG XL Image
- Extension
.jxl- MIME type
image/jxl- Category
- image
- Data type
- Binary
- Developer
- Joint Photographic Experts Group
Image properties
- Structure
- Raster
- Compression
- Lossless and lossy
- Transparency
- Yes
- Animation
- Yes
File signatures
| Offset | Hexadecimal | ASCII | Description |
|---|---|---|---|
| 0 | FF 0A | — | Signature used by the raw JPEG XL codestream format. |
| 0 | 00 00 00 0C 4A 58 4C 20 0D 0A 87 0A | — | Signature used by the JPEG XL ISO Base Media File Format container. |
Common uses
High-quality photographs
HDR images
Lossless image storage
Web and cloud image delivery
Archival image workflows
Related formats
Technical resources
| Resource | Publisher | Link |
|---|---|---|
| JPEG XL | JPEG | Open resource ↗ |
| Media Types Registry | IANA | Open resource ↗ |
Record information
- Verified
- October 4, 2026
- Last updated
- October 4, 2026