VPK file, used to store game data for some Source Engine games — file signature 34 12 AA 55 at offset 0

For VPK file, used to store game data for some Source Engine games, hex signature is 34 12 AA 55; offset is 0; extension is vpk, verified against its source on 2026-09-22.

What the source says

34 12 AA 55 | 4␒ªU | 0 | vpk | VPK file, used to store game data for some Source Engine games |

— en.wikipedia.org, retrieved 2026-09-22

Source

• en.wikipedia.orghttps://en.wikipedia.org/wiki/List_of_file_signatures

Last verified against source: 2026-09-22. Due for re-check by 2027-09-22. This page as Markdown · OKF bundle · full dataset as JSON.