CAB (Cabinet) is a compression archive format from Microsoft, used since Windows 95 for software installation packages, driver packages and Windows Update files. It uses MSZIP, Quantum or LZX compression.

Are my CAB files uploaded?

No. Files you open from your device stay on your device and are read locally. Only the public sample archive is requested from the server.

Can it open all CAB compression methods?

The viewer handles standard CAB files with MSZIP and LZX compression. Some rare or legacy compression methods may have limited support.

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CAB Viewer

Free online CAB viewer. Open Microsoft Cabinet archives (.cab) in your browser to list contents — no upload, no extraction.

.cab

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About this file format

CAB (.cab, Microsoft Cabinet), introduced with Windows 95 in 1995, is a single-file archive format used widely across the Windows ecosystem for software installation, drivers and system updates. It supports MSZIP (Deflate), Quantum and LZX compression methods and can digitally sign archives. While less common outside Windows, CAB files remain important for legacy software and driver distribution.

CAB Viewer

About this file format

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CAB Viewer

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