---
type: lookup
id: xar-78-61-72-21
asset: file-format-signatures
title: "78 61 72 21 — File format magic numbers"
sources:
  - https://en.wikipedia.org/wiki/List_of_file_signatures
source_quote: "xar! | 0 | xar | <https://en.wikipedia.org/wiki/Xar_(archiver)> eXtensible ARchive format [ 52 ] |"
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-08-03
hex_signature: "78 61 72 21"
offset: "0"
extension: "xar"
format: "eXtensible ARchive format"
unverified_fields: hex_signature
---
**Hex signature:** 78 61 72 21

**Offset:** 0

**Extension:** xar

**Format:** eXtensible ARchive format

> xar! | 0 | xar | <https://en.wikipedia.org/wiki/Xar_(archiver)> eXtensible ARchive format [ 52 ] |

Source: <https://en.wikipedia.org/wiki/List_of_file_signatures>