Having problems opening a CAT file?

We have programs that can open or convert your CAT files.

Opening CAT files

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

What is a CAT file?

The .cat file extension can be found in files that are commonly used in a variety of Microsoft and Internet applications. A CAT file is necessary because it holds the security catalog file that contains a list and digest files. A digest is a number generated by an algorithm and is uniquely identifiable to a given file, like a fingerprint. The digest is used for security or validation purposes.

Catalog files are used in order to avoid multiple trust dialog boxes when users download software components from the Internet. Trust dialog boxes are modal security warnings that prompt users before a software is installed on their computers. Catalog files specify that a given set of files belongs to the same logical group of files.

They identify which program files are already installed on the system and if the user attempts to download another program with the same program files, CAT files prompt the user that the same files are already installed to avoid duplication. CAT files also help the user to use trusted programs by putting a focus utilization to applications that are already tried and tested.

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

About File Extension CAT

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the CAT file format or software that uses files with the CAT suffix, please do get in touch - we would love hearing from you.