Windows
Compatible Applications
What is a .fit file?
File Extension Details
The FIT (Flexible and Interoperable Data Transfer) file format is a compact, binary file format designed specifically for the storage and sharing of data generated by sports, fitness, and health devices. Developed by ANT+ (a subsidiary of Garmin), it is the primary format used by Garmin wearables, bike computers, and other fitness sensors to record activities in real-time. Unlike text-based formats like GPX or TCX, FIT files are highly optimized for small file sizes and low memory usage, making them ideal for devices with limited storage and processing power. A FIT file consists of a series of data messages that can store a wide variety of information, including GPS coordinates, heart rate, cadence, power output, temperature, and lap splits. Because it is a binary format, it requires specific software or SDKs to decode, but its efficiency has made it the industry standard for professional athletes and fitness enthusiasts. The format is also extensible, allowing manufacturers to add custom data fields without breaking compatibility with existing software. Most major fitness platforms, such as Strava, TrainingPeaks, and Zwift, natively support FIT files for activity analysis and performance tracking.
Software Compatibility
Programs that can open and work with .fit files
macOS
Compatible Applications
Linux
Compatible Applications
Mobile
Mobile Applications
Frequently Asked Questions
About .fit files
To open a .fit file, you need compatible software. Here are some options:
- Garmin BaseCamp
- GoldenCheetah
- Garmin Connect
To convert a .fit file to another format, you can:
- Use compatible software Many programs that open .fit files also allow you to save or export them to different formats.
- Try online conversion services: Websites like Zamzar, CloudConvert, or Online-Convert allow you to convert files between different formats without installing software.
- Specialized conversion tools: Search for '.fit converter' to find tools specifically designed for this file type.
- Verify the file extension is correct:
- Update your software:
- Try alternative software:
- Check for file corruption:
Like any file type, .fit files can be safe or potentially risky depending on their source:
- Always scan files with antivirus software before opening
- Keep your operating system and applications updated.
- Be especially cautious with executable file types
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