All about CAB Files

The CAB file type is primarily associated with Windows Installer.

CAB	File extension: CAB
	File type:	compressed archive

What is a CAB file?

CAB files mostly belong to Windows Installer by Microsoft. A CAB (short for Cabinet) file is a compressed archive primarily used to distribute installer packages for Windows operating system. A single CAB file contains losslessly compressed data and checksums used to maintain data integrity. The Makecab.exe component of Windows SDK is used to create a CAB file. InstallShield Windows installer package authoring software uses a CAB file saved in a different format. Unlike the proprietary compression format used by Microsoft's CAB format, InstallShield's CAB archive uses zlib compression. One can identify either format by looking at their headers (MSCF for Windows and ISC for Installshield).

How to open CAB files

You need a suitable software like Windows Installer to open a CAB file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your CAB file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CAB file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CAB File Viewer

Choose your .cab file to view

or drag and drop it here

Online File Viewer

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How to extract texts from CAB files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

1. Just click the "Choose your .cab file to view" button on this page.
2. Your CAB file will then be displayed in the browser.
3. Now click on "Save as..." at the top of the page.
4. Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
5. Your file will be converted and downloaded.

CAB format details:

If you can determine the file format, the associated program can also be determined. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Below you will find our evaluation of the CAB files:

The CAB extension is quite commonly used. The file itself mainly uses a defined CAB format. However, the following two file formats are common:

• 70% of all CAB files are Microsoft Cabinet Archive files, which are using the popular CAP file format. CAP files are compressed archives. The first bytes (the signature) are 'MSCF' (short for MicroSoft Cabinet File). The contents of these files cannot be read by a human; only a computer program can interpret the data. Most of these files are 9 KB to 24 MB in size. The file type was developed 20 years ago and is still in use today. Certain words are almost always found in the files, such as MSCF. Such CAB files store data about data, windows, latest, configuration, network, package, backup and compdb.
• 20% of all CAB files belong to InstallShield compressed Archive. If you open these files in a text editor, you will see only illegible characters. A typical file size is 1 MB. The keywords ISc( are typical for these files. Some examples of file names are data1.cab or data2.cab.

All other CAB files (10%) have no uniform format. Often described as desktop, found, express, xact, incredi, neutral, persist, swflash, engine, office, sector, xinput, logs or mail. Just click the "Choose your .cab file to view" button on this page to find out what your CAB file is.