FIT File Viewer & Analyzer
Upload your .fit file to instantly view heart rate, power, cadence, elevation, and GPS data with interactive charts. Works with files from Garmin, Wahoo, Suunto, and all ANT+ devices.
Why open a FIT file outside Garmin Connect
A FIT file is the raw activity recording from your watch — every heart rate sample, every GPS point, every power reading, every device event. Garmin Connect and Strava show you a summary view, but they hide the underlying record. If you want to sanity-check what your sensors actually captured before sharing the activity, debug a weird-looking ride, or pull data from a device that does not sync to your usual platform, you need a viewer that opens the raw file directly.
What this viewer shows you
Upload your .fit file and the viewer parses every record on the spot — your data never leaves your browser. You get:
- Interactive charts for heart rate, power, cadence, speed, and elevation across the whole activity.
- GPS track overlay where coordinates exist (cycling, running, hiking — anything outdoor).
- Lap-by-lap splits with averages, maxes, and durations.
- Device metadata: brand, model, firmware, battery state at start and end.
- Raw record table — sortable, searchable, exportable if you need spreadsheet-friendly data.
Works with files from Garmin watches and Edge bike computers, Wahoo ELEMNT, Suunto, Hammerhead Karoo, and any other device that writes the standard FIT format.
Comparing FIT files side by side
If you need to compare two activities — the same loop on different days, or the same ride recorded by two devices — open them in separate browser tabs. The chart axes and lap structures align easily for visual diff. For deeper edits (trim, cap spikes, fix timestamps), pass the file on to our FIT File Editor, or send it to the repair tool if Garmin Connect rejected it.
Drag & drop your FIT files here
or click to browse — max 50 MB
How to View FIT Files Online
- Drag and drop your .FIT file onto the upload area above, or click to browse
- Your file is parsed instantly in your browser — no data leaves your device
- Explore interactive charts for heart rate, power, cadence, and elevation
- Browse the full data table with pagination and search
- View lap summaries and session statistics
FAQ
What is a FIT file and how do I open it?
FIT (Flexible and Interoperable Data Transfer) is a file format created by Garmin for storing activity data from GPS devices and fitness trackers. Upload your .fit file to this viewer to open it instantly in your browser — no software installation needed.
Which devices export FIT files?
Most Garmin watches and bike computers (Forerunner, Fenix, Edge), Wahoo ELEMNT bike computers, Suunto watches, Hammerhead Karoo, and many other ANT+/Bluetooth-enabled fitness devices save activities in FIT format.
Is my data safe when I use this FIT file viewer?
Yes. Your FIT file is processed entirely in your browser using JavaScript. No data is uploaded to any server. You can verify this by using the tool with your internet disconnected after the page loads.
What data can I see in a FIT file?
Depending on your device and sensors, FIT files can contain heart rate, power, cadence, speed, GPS coordinates, elevation, temperature, lap splits, and device information. This viewer displays all available data channels with interactive charts.
Is this also a FIT file reader and decoder?
Yes — "viewer", "reader", and "decoder" all describe the same job: parsing the binary FIT format and showing you what is inside. This tool reads every record, lap, and session message in the file and decodes them into human-readable charts and tables. If you just want to read raw values without the UI, switch to the CSV export in our <a href="/en/tools/fit-files/fit-file-converter/">FIT File Converter</a>.