Convert GPX (.gpx) to Garmin FIT (.fit)
RouteConverter opens GPX files and saves them as Garmin FIT — free, offline, no upload required.
How to convert .gpx to .fit
- Open the .gpx file via File → Open.
- Pick Garmin FIT in the Save as dropdown.
- Choose where to save it via File → Save as.
About GPX (.gpx)
GPX (GPS Exchange Format) is an open XML format for waypoints, tracks and routes, with optional time, elevation and extension fields. It's the universal GPS interchange format — read and written by Garmin Connect, Google Earth, OsmAnd, Strava, komoot and nearly every GPS app or device made since 2004.
About Garmin FIT (.fit)
FIT (Flexible and Interoperable Data Transfer) is Garmin's binary format for activity recordings, storing time-series sensor data such as heart rate, cadence and power alongside the track. Written by Garmin Edge, fēnix and Forerunner devices, and read by Strava, TrainingPeaks and Zwift.
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FAQ
Can RouteConverter convert .gpx to .fit for free?
Yes. RouteConverter is free and open source. Opening a GPX file and saving it as Garmin FIT does not require an account, a subscription, or an internet connection.
Does the file get uploaded anywhere?
No. RouteConverter runs on your own computer (Windows, macOS or Linux) and converts the file locally — nothing is sent to a server.
Can I convert .fit back to .gpx?
Usually yes — open the Garmin FIT file and pick GPX in the Save-as dropdown. Fields the target format cannot represent are dropped with a warning.