Free FIT file viewer online Open a .fit file in your browser and download it as GPX. Nothing is uploaded.
Open a FIT file
and see what's inside.
Drop the .fit from your Garmin, Wahoo, COROS or Suunto. You get the outline of the track, the distance, where it starts and ends, and the numbers the device recorded: time, climb, heart rate, power, calories.
One click downloads the same activity as a GPX file, heart rate and cadence included. The file is read on your device.
How to open a FIT file online
Four steps, no software.
Step 1
Pick the FIT file
Drag the .fit onto this page or click Select FIT file. Files from Garmin, Wahoo, COROS, Suunto, Polar and Zwift work; the format is the same.
Step 2
Read the ride
The page decodes the file on your device and shows the outline, the distance, the start and end, and the session numbers: time, climb, heart rate, power, calories.
Step 3
Download the GPX file
Click Download GPX file. The track comes out with elevation and timestamps, plus heart rate, cadence, power and temperature as extensions Strava and Garmin understand.
Step 4
Optional: see it in 3D
Open 3D preview shows the same route on satellite terrain in the AvoMap editor, where you can render a video of it.
FIT files:
what they are and where they come from
What is a FIT file?
FIT stands for Flexible and Interoperable Data Transfer. Garmin designed it for watches and bike computers: a compact binary format that records a point every second with position, altitude, heart rate, cadence, power, temperature and whatever else the sensors provide, plus lap and session summaries. A one-hour ride is a few hundred kilobytes.
Because it is binary, a text editor shows garbage and most map tools refuse it. That is what this page is for: it decodes the file in your browser and shows you the ride.
Where do I find my .fit files?
Garmin: plug the watch or Edge into a computer and look in GARMIN/Activity, or open the activity in Garmin Connect, click the gear icon and choose Export Original. Wahoo: the ELEMNT app shares the .fit from the ride history. COROS and Suunto: export from the activity page in their apps.
Strava also exports the original file it received, which is usually a .fit: open the activity, click the three dots, Export Original.
What the FIT to GPX download keeps
GPX holds less than FIT. This is what makes the trip and what does not.
| Track | Every recorded point with a GPS position becomes a track point. Points without a position, from before the fix or an indoor stretch, are left out. |
|---|---|
| Elevation and time | Kept for every point. FIT timestamps are exact to the second, and the GPX keeps them, so Strava files the activity at the right time. |
| Heart rate, cadence, temperature | Kept, as Garmin TrackPointExtension tags. Strava, Garmin Connect and Komoot read them. |
| Power | Kept as a power tag in the extensions, the way Strava expects it. |
| Speed and distance per point | Not written. GPX readers work them out from position and time. |
| Laps | Shown on this page, not written to the GPX. GPX has no lap concept. |
| Session summary | Shown on this page. Calories, average power and the rest do not exist in GPX. |
| Developer fields, HRV, running dynamics | Dropped. |
FIT to GPX for Strava, Komoot and Google Earth
Where the GPX goes once you have it.
Strava
Strava uploads FIT files directly, so you rarely need this for it. Convert when Strava rejects a file it cannot parse, or when you want to look at the ride first. The GPX carries the timestamps Strava needs and the heart rate and power it shows.
Komoot
Komoot imports GPX, not FIT. Convert here, then upload the GPX under your tours as a completed tour, and it appears with the recorded date.
Google Earth
Google Earth opens KML, not FIT. Download the GPX here and run it through the GPX to KML converter, or open the GPX straight in Google Earth Pro on the desktop.
A broken upload
When a watch produced a file your platform chokes on, this page shows what is actually in it: how many points have positions, whether the heart rate strap connected, and where the session summary says you went.
Garmin Connect
Connect exports the original .fit and imports FIT and GPX alike. Use this page to check a file from another brand before importing it into Connect.
Other free GPS file tools
Same idea on every page: the file is read in your browser and nothing is uploaded unless you open the 3D preview.
Animate the FIT file as a 3D map video in the AvoMap editor
The viewer shows you the outline. The AvoMap editor puts the same ride on satellite terrain, uses the elevation the device recorded so the road actually climbs, flies a camera along it and exports an MP4 in up to 4K.
The editor is free to use. You pay per exported video, and that pays for the free tools on this site.
Create a video from a FIT fileVideos Made With AvoMap
Explore the full range of AvoMap features in action with these videos, all created using the easy-to-use editor.
Frequently asked questions
Is the FIT file viewer free?
Yes. Opening a file, the numbers, the GPX download and the 3D preview cost nothing, and there is no account to make. AvoMap charges for exported videos, and that pays for the free tools.
Is my FIT file uploaded?
No. The file is decoded in your browser. Two things leave your device: the coordinates of the first and last point, looked up to show place names, and the whole route if you click Open 3D preview. The GPX download is written locally.
How do I convert FIT to GPX?
Drop the .fit here and click Download GPX file. The GPX has the track with elevation and timestamps, and heart rate, cadence, power and temperature as extensions.
Which devices' FIT files work?
Any device that writes a standard FIT activity: Garmin watches and Edge computers, Wahoo ELEMNT, COROS, Suunto, Polar, Bryton, Hammerhead, and exports from Zwift and Strava. Files that are not activities, such as workouts or courses, open but have no track to show.
Why does it say there are no GPS positions?
The activity was recorded indoors, on a trainer or treadmill, or the device never got a fix. The session numbers are still decoded and shown, but there is no track to draw or export.
Does the GPX keep heart rate and power?
Yes. Heart rate, cadence and temperature go into Garmin TrackPointExtension tags and power into a power tag, which is what Strava and Garmin Connect read. Speed, distance and lap markers are not part of GPX and are shown on this page only.
Can I open a FIT file on my phone?
Yes. Open this page in the browser on an iPhone or Android phone, pick the .fit from your files app, and the GPX lands in your downloads. Nothing to install.
Can I convert GPX to FIT here?
Not yet. FIT is the more capable format, so most platforms accept GPX directly. Garmin Connect imports GPX as a course, and Strava as an activity if it has timestamps.