VPK (Valve) file format

.vpk · archive (game asset bundle) · introduced 2004 by Valve

What is a VPK (Valve) file?

VPK is Valve's package format for Source-engine games, replacing the older GCF as Steam's game content layout. It supports multi-volume splits with a small header file and many _001.vpk, _002.vpk data shards. Modders for Half-Life 2, Team Fortress 2, Left 4 Dead, and Counter-Strike interact with VPK files to install custom skins and maps.

Most readers reach this page after double-clicking a .vpk file and finding their operating system unsure what to do with it. The good news: VPK (Valve) is a well-understood format with mature tooling on every major platform. It is supported in one click by mainstream archivers on Windows, macOS, and Linux.

How to extract a VPK (Valve) file

Opening a .vpk file is straightforward on every modern operating system. The exact steps depend on which platform you are on:

On Windows

Locate the .vpk file in File Explorer.
Right-click the file. If you have 7-Zip installed, choose 7-Zip → Extract Here. On Windows 11 the built-in extractor handles ZIP, 7z, RAR and several other formats directly through Extract All…
If prompted, pick a destination folder and click Extract.
The extracted files appear in a folder next to the original archive.

On macOS

Find the .vpk file in Finder.
Install The Unarchiver from the Mac App Store, or Keka for both creating and extracting.
Right-click the file → Open With → The Unarchiver (or just double-click after Unarchiver is set as the default).
The extracted folder appears next to the archive.

On Linux

Use your file manager: right-click the archive → Extract Here (file-roller on GNOME, Ark on KDE).

On the command line, run one of:

7z x archive.vpk    # works for almost any format

The files appear in the current directory.

How to create a VPK (Valve) file

To pack files into a .vpk archive, you typically need an archiver that supports writing this format. Not every tool can create every format — for example, only WinRAR can create real RAR files. The sidebar lists the software known to read and write VPK (Valve).

On the command line, the canonical create command is:

# Use 7-Zip, PeaZip, or the format's reference tool to create .vpk files.

If you regularly create archives at scale, a dedicated archive automation suite can wrap this command in scheduled jobs, integrity checks, and offsite replication.

Strengths

Multi-volume
Supports streaming from disk

Weaknesses and limitations

Valve-specific
Limited tooling outside the modding scene

Typical use cases

Source engine games
Half-Life 2 / Portal / TF2 modding

Technical details

VPK (Valve) uses the None (raw or LZMA chunks) algorithm and is identified on disk by the magic byte sequence 34 12 AA 55. The standard MIME type is application/x-valve-vpk. The format is an open specification and is free for any use.

Frequently asked questions

Is VPK (Valve) safe to open?

Archive files are containers — they are only as safe as what they contain. A .vpk from a trusted source is fine; one received from a stranger can hold malicious executables, scripts, or files engineered to exploit bugs in your archiver. Always keep your archiver updated, and never run unknown executables that come out of an archive. A safe workflow is to extract into a sandbox and scan the contents before opening anything.

What is the maximum file size?

Modern implementations support archives in the multi-terabyte range. The practical limit is your filesystem (FAT32 caps at 4 GB; ext4, NTFS, APFS, and exFAT all comfortably handle multi-TB files).

Can I password-protect a VPK (Valve)?

Some archivers can wrap VPK (Valve) files in an encrypted container, but the format itself does not always include built-in encryption. Check your archiver's documentation.

How does VPK (Valve) compare to other formats?

See our format comparison pages such as ZIP vs 7z, ZIP vs RAR, and tar.gz vs tar.xz for side-by-side feature tables.