---
type: lookup
id: vpk-34-12-aa-55
asset: file-format-signatures
title: "34 12 AA 55 — File format magic numbers"
sources:
  - https://en.wikipedia.org/wiki/List_of_file_signatures
source_quote: "VPK file, used to store game data for some <https://en.wikipedia.org/wiki/Source_Engine> Source Engine games"
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-08-03
hex_signature: "34 12 AA 55"
offset: "0"
extension: "vpk"
format: "VPK file, used to store game data for some Source Engine games"
unverified_fields: hex_signature, offset
---
**Hex signature:** 34 12 AA 55

**Offset:** 0

**Extension:** vpk

**Format:** VPK file, used to store game data for some Source Engine games

> VPK file, used to store game data for some <https://en.wikipedia.org/wiki/Source_Engine> Source Engine games

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