# BigTIFF — file signature 49 49 2B 00 (little-endian) at offset 0

For BigTIFF, hex signature is 49 49 2B 00 (little-endian); offset is 0; extension is tif tiff, verified against its source on 2026-09-22.

- **Hex signature:** 49 49 2B 00 (little-endian) _(verified: appears in the quote below)_
- **Offset:** 0 _(verified: appears in the quote below)_
- **Extension:** tif tiff _(verified: appears in the quote below)_
- **Format:** BigTIFF _(verified: appears in the quote below)_

## What the source says

> 49 49 2B 00 (little-endian) | II+␀ | 0 | tif tiff | BigTIFF [11] |

## 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/).