# Image encoded in the JPEG XL format — file signature FF 0A at offset 0

For Image encoded in the JPEG XL format, hex signature is FF 0A; offset is 0; extension is jxl, verified against its source on 2026-09-22.

- **Hex signature:** FF 0A _(verified: appears in the quote below)_
- **Offset:** 0 _(verified: appears in the quote below)_
- **Extension:** jxl _(verified: appears in the quote below)_
- **Format:** Image encoded in the JPEG XL format _(verified: appears in the quote below)_

## What the source says

> 00 00 00 0C 4A 58 4C 20 0D 0A 87 0A | ␀␀␀␌JXL␠␍␊‡␊ | 0 | jxl | Image encoded in the JPEG XL format [91] | FF 0A | ÿ␊ |

## Source

- https://en.wikipedia.org/wiki/List_of_file_signatures

Last verified: 2026-09-22. Review by: 2027-09-22.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).