# IFF Animated Bitmap — file signature 46 4F 52 4D ?? ?? ?? ?? 41 4E 42 4D at offset 0 any

For IFF Animated Bitmap, hex signature is 46 4F 52 4D ?? ?? ?? ?? 41 4E 42 4D; offset is 0 any; extension is anbm iff, verified against its source on 2026-09-22.

- **Hex signature:** 46 4F 52 4D ?? ?? ?? ?? 41 4E 42 4D _(verified: appears in the quote below)_
- **Offset:** 0 any _(verified: appears in the quote below)_
- **Extension:** anbm iff _(verified: appears in the quote below)_
- **Format:** IFF Animated Bitmap _(verified: appears in the quote below)_

## What the source says

> 46 4F 52 4D ?? ?? ?? ?? 41 4E 42 4D | FORM????ANBM | 0 any | anbm iff | IFF Animated Bitmap |

## 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/).