FIT File

What are FIT files and how to open them

Are you having problems opening a FIT file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your FIT files.

What is a FIT file?

FIT files have multiple uses, and Garmin Flexible and Interoperable Data Transfer is one of them. Read more about the other uses further down the page.

Garmin Flexible and Interoperable Data Transfer File

The .fit file extension is used for a data file format developed by Garmin Ltd. FIT is short for Flexible and Interoperable Data Transfer. These files are generated as activity files by the Garmin Training Center software, which allows users to monitor their physical activities and exercises like cycling, swimming, and other workout sessions.

These .fit files contain logged data like date and time stamps, activity details, and other pieces of information related to the physical exercises of the user. They can be created and edited using the Garmin Training Center software for Windows PCs or Mac OS X computers. The data stored in these FIT files can also be viewed through the user interface of this software.

How to open FIT files

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

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

Last updated: January 22, 2025

All known file formats using extension .FIT

While Garmin Flexible and Interoperable Data Transfer File is a popular type of FIT-file, we know of 2 different uses of the .FIT file extension. Different software may use files with the same extension for different types of data.

Mechwarrior FIT Data File

We know that one FIT format is Mechwarrior FIT Data File. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Various apps that use files with this extension

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

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about FIT file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.