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WAD (Where's All the Data) file format

.wad  ·  archive (game-specific)  ·  introduced 1993 by id Software (DOOM)

What is a WAD (Where's All the Data) file?

WAD ("Where's All the Data") is the archive format invented by id Software for DOOM in 1993. IWADs are the original game data; PWADs are patch files that override or add resources. The DOOM modding community has produced tens of thousands of PWADs over three decades — a testament to a beautifully simple format.

Most readers reach this page after double-clicking a .wad file and finding their operating system unsure what to do with it. The good news: WAD (Where's All the Data) 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 WAD (Where's All the Data) file

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

On Windows

  1. Locate the .wad file in File Explorer.
  2. 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…
  3. If prompted, pick a destination folder and click Extract.
  4. The extracted files appear in a folder next to the original archive.

On macOS

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

On Linux

  1. Use your file manager: right-click the archive → Extract Here (file-roller on GNOME, Ark on KDE).
  2. On the command line, run one of: 
    7z x archive.wad    # works for almost any format
  3. The files appear in the current directory.

How to create a WAD (Where's All the Data) file

To pack files into a .wad 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 WAD (Where's All the Data).

On the command line, the canonical create command is:

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

  • Trivially simple format
  • Modding-friendly
  • Massive community

Weaknesses and limitations

  • Engine-specific
  • No compression

Typical use cases

  • DOOM and DOOM-engine game data
  • DOOM modding (PWADs)

Technical details

WAD (Where's All the Data) uses the None algorithm and is identified on disk by the magic byte sequence IWAD / PWAD. The standard MIME type is application/octet-stream. The format is an open specification and is free for any use.

Frequently asked questions

Is WAD (Where's All the Data) safe to open?

Archive files are containers — they are only as safe as what they contain. A .wad 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 WAD (Where's All the Data)?

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

How does WAD (Where's All the Data) 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.

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