---
type: lookup
id: qcow-51-46-49
asset: file-format-signatures
title: "51 46 49 — File format magic numbers"
sources:
  - https://en.wikipedia.org/wiki/List_of_file_signatures
source_quote: "qcow | <https://en.wikipedia.org/wiki/Qcow> qcow file format"
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-08-03
hex_signature: "51 46 49"
offset: "0"
extension: "qcow"
format: "qcow file format"
unverified_fields: hex_signature, offset
---
**Hex signature:** 51 46 49

**Offset:** 0

**Extension:** qcow

**Format:** qcow file format

> qcow | <https://en.wikipedia.org/wiki/Qcow> qcow file format

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