# Quark Express document — file signature 00 00 49 49 58 50 52 (little-endian) 00 00 4D 4D 58 50 52 (big-endian) at offset 0

For Quark Express document, hex signature is 00 00 49 49 58 50 52 (little-endian) 00 00 4D 4D 58 50 52 (big-endian); offset is 0; extension is qxd, verified against its source on 2026-09-22.

- **Hex signature:** 00 00 49 49 58 50 52 (little-endian) 00 00 4D 4D 58 50 52 (big-endian) _(verified: appears in the quote below)_
- **Offset:** 0 _(verified: appears in the quote below)_
- **Extension:** qxd _(verified: appears in the quote below)_
- **Format:** Quark Express document _(verified: appears in the quote below)_

## What the source says

> 00 00 49 49 58 50 52 (little-endian) 00 00 4D 4D 58 50 52 (big-endian) | ␀␀IIXPR ␀␀MMXPR | 0 | qxd | Quark Express document |

## 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/).