# TrID — file signature 52 59 46 46 ?? ?? ?? ?? 54 52 49 44 at offset 0

For TrID, hex signature is 52 59 46 46 ?? ?? ?? ?? 54 52 49 44; offset is 0; extension is trd, verified against its source on 2026-09-22.

- **Hex signature:** 52 59 46 46 ?? ?? ?? ?? 54 52 49 44 _(verified: appears in the quote below)_
- **Offset:** 0 _(verified: appears in the quote below)_
- **Extension:** trd _(verified: appears in the quote below)_
- **Format:** TrID _(verified: appears in the quote below)_

## What the source says

> 52 59 46 46 ?? ?? ?? ?? 54 52 49 44 | RIFF????TRID | 0 | trd | TrID |

## 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/).