---
type: lookup
id: item-53-5a-44-44
asset: file-format-signatures
title: "53 5A 44 44 — File format magic numbers"
sources:
  - https://en.wikipedia.org/wiki/List_of_file_signatures
source_quote: "??_ | Windows 9x Compressed File"
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-08-03
hex_signature: "53 5A 44 44"
offset: "0"
extension: "??_"
format: "Windows 9x Compressed File"
unverified_fields: hex_signature, offset
---
**Hex signature:** 53 5A 44 44

**Offset:** 0

**Extension:** ??_

**Format:** Windows 9x Compressed File

> ??_ | Windows 9x Compressed File

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