CAB File Opener. Open CAB Online, Free

Extract and view Windows Cabinet .cab files directly in your browser. Download individual files or export as ZIP. Files never leave your device.

Driver packages, Windows Update, legacy installers · Free up to 200 MB · No software install

Drop a .cab file here

or click to select from your computer

Files never leave your device. 100% in-browser

Windows Cabinet archives (drivers, installers, updates) · Free up to 200 MB

Need to open a RAR archive? Open RAR Online Need to open a 7z file? Open 7z Online

How it works

This tool uses libarchive compiled to WebAssembly to decompress Windows Cabinet archives entirely in your browser. The same engine that powers the Open 7z Online tool handles .cab natively. No server, no upload, no software to install.

For RAR archives, use Open RAR Online. For tar.gz archives from Linux servers, see Open tar.gz Online. Read the full guide at How to Open CAB Files Online.

Common uses for CAB files

Windows Cabinet archives appear in several common scenarios where you may need to extract specific files without running an installer:

Driver packages: Hardware manufacturers distribute drivers as .cab files. You can extract the .inf, .sys, or .dll files to manually install or inspect a specific driver version.
Windows Update (.msu) contents: Windows Update packages (.msu) contain .cab files internally. Extracting gives you individual hotfix files, useful for offline deployment.
Legacy InstallShield installers: Many older Windows applications use .cab files as part of their setup. You can extract and inspect the payload without running the installer.
Font packages and Office updates: Microsoft distributes some fonts and Office language packs as .cab archives that you can open and inspect here.

Opening CAB files on Mac and Linux

macOS and Linux have no native .cab support. On Linux the cabextract command-line utility handles .cab files, but it requires installation. On Mac, there is no built-in option at all. This browser tool is the fastest cross-platform solution: drop the file, get the contents, no install required on any OS.

Frequently asked questions

Are my files uploaded to a server?

No. Everything happens 100% in your browser using WebAssembly. Your .cab files never leave your device and are never uploaded to any server.

Is it free to use?

Yes. Extracting .cab files up to 200 MB is completely free. No signup required. For archives larger than 200 MB, a one-time 24-hour Day Pass ($2.99) removes this limit instantly.

What is a .cab file?

A .cab file (Windows Cabinet) is a compressed archive format developed by Microsoft. It is used to package Windows driver files (.inf, .sys, .dll), Windows Update packages, and legacy software installers (InstallShield, Setup Factory). The format supports multiple compression algorithms and file spanning across multiple cabinet files.

Can I open a CAB file on Mac or Linux?

Yes. This browser tool works on any operating system — Mac, Linux, Windows, or ChromeOS. There is no software to install. Just drop your .cab file onto the page and the contents are extracted instantly.

Is there a file size limit?

The free plan supports .cab files up to 200 MB. For larger archives, a one-time 24-hour Day Pass ($2.99) removes this limit instantly.

Can I extract a single driver file from a CAB without installing the full package?

Yes. Drop the .cab file, wait for the file list to appear, then click the individual file (e.g. a .inf or .sys driver file) to download just that one file. You do not need to extract everything.

Related tools

Open 7z Online

Extract & view .7z files in-browser, convert to ZIP

Open RAR Online

Extract & view RAR files in-browser, no upload

Open tar.gz Online

Extract & view .tar.gz / .tgz / .gz files in-browser, convert to ZIP

Create a ZIP File

Bundle files or a folder into one .zip, in-browser, no upload

How it works

For RAR archives, use Open RAR Online. For tar.gz archives from Linux servers, see Open tar.gz Online. Read the full guide at How to Open CAB Files Online.

Common uses for CAB files

Windows Cabinet archives appear in several common scenarios where you may need to extract specific files without running an installer:

Driver packages: Hardware manufacturers distribute drivers as .cab files. You can extract the .inf, .sys, or .dll files to manually install or inspect a specific driver version.

Windows Update (.msu) contents: Windows Update packages (.msu) contain .cab files internally. Extracting gives you individual hotfix files, useful for offline deployment.

Legacy InstallShield installers: Many older Windows applications use .cab files as part of their setup. You can extract and inspect the payload without running the installer.

Font packages and Office updates: Microsoft distributes some fonts and Office language packs as .cab archives that you can open and inspect here.

Opening CAB files on Mac and Linux

Frequently asked questions

Are my files uploaded to a server?

No. Everything happens 100% in your browser using WebAssembly. Your .cab files never leave your device and are never uploaded to any server.

Is it free to use?

Yes. Extracting .cab files up to 200 MB is completely free. No signup required. For archives larger than 200 MB, a one-time 24-hour Day Pass ($2.99) removes this limit instantly.

What is a .cab file?

Can I open a CAB file on Mac or Linux?

Is there a file size limit?

The free plan supports .cab files up to 200 MB. For larger archives, a one-time 24-hour Day Pass ($2.99) removes this limit instantly.

Can I extract a single driver file from a CAB without installing the full package?

Yes. Drop the .cab file, wait for the file list to appear, then click the individual file (e.g. a .inf or .sys driver file) to download just that one file. You do not need to extract everything.