JPEG 2000 format — file signature FF 4F FF 51 at offset 0

For JPEG 2000 format, hex signature is FF 4F FF 51; extension is jp2 j2k jpf jpm jpg2 j2c jpc jpx mj2, verified against its source on 2026-09-22.

What the source says

00 00 00 0C 6A 50 20 20 0D 0A 87 0A | ␀␀␀␌jP␠␠␍␊‡␊ | 0 | jp2 j2k jpf jpm jpg2 j2c jpc jpx mj2 | JPEG 2000 format [18] | FF 4F FF 51 | ÿOÿQ |

— en.wikipedia.org, retrieved 2026-09-22

Source

• en.wikipedia.orghttps://en.wikipedia.org/wiki/List_of_file_signatures

Last verified against source: 2026-09-22. Due for re-check by 2027-09-22. This page as Markdown · OKF bundle · full dataset as JSON.