INDEX File Type

- The quick facts

What are INDEX files and how to open them

Are you having problems opening an INDEX file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is an INDEX file?

Files that contain the .index file extension are most commonly associated with the index files that are used for the Linux, Unix and Mac operating systems. The index files that are used by these operating systems store files that keep track of all the different types of files that your computer uses, how the files are used and which programs may access the files.

When an operating system is installed on a user's computer, the INDEX file is first created. That index file is then updated as files are added and removed to and from the user's computer hard drive.

How to open INDEX files

Important: Different programs may use files with the INDEX file extension for different purposes, so unless you are sure which format your INDEX file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 5 different INDEX openers which you will find listed below.

Last updated: March 30, 2021

Suggest another file format using extension INDEX

While we know of one file format using the .INDEX file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .INDEX file.

Various apps that use files with this extension

These apps are known to open certain types of INDEX files. Remember, different programs may use INDEX files for different purposes, so you may need to try out a few of them to be able to open your specific file.