Opening 004 files

Did your computer fail to open a 004 file? We explain what 004 files are and recommend software that we know can open or convert your 004 files.

What is a 004 file?

The .004 file extension is commonly used by a variety of file compression and archiving tools. Certain compression and archive utilities possess the ability to break archive files down into separate volumes when an archive file becomes too big. This makes it easier to distribute the files over the Web.

When a file archive is broken down into smaller parts, the volumes within the archive are given a series of extensions which are usually in sequence. The .004 file extension is normally assigned to the fourth volume of the file archive. A split archive file cannot be opened unless all of the volumes within the archive are combined.

Popular applications that can break archive files down into multiple volumes include the WinRAR application and 7-Zip archive utility.

Try a universal file viewer

In addition to the products listed above, I would suggest that you try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and very likely yours too! Download Free File Viewer.

By Prof. Jones (The File Expert)

Chief Content Editor and File Expert

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