GPX, FIT, and TCX can all carry activity data, but they are designed for different jobs. Use GPX for a portable route line, FIT for the richest device recording, and TCX for broad training-platform compatibility.
Quick comparison
| Format | Best for | Typical contents |
|---|---|---|
| GPX | Routes, tracks, maps, design tools | Coordinates, elevation, timestamps, sometimes extensions |
| FIT | Original device and training data | Route plus laps, sensors, workouts, device fields |
| TCX | Training exchange between services | Route, laps, heart rate, cadence, power where available |
Choose GPX when the path matters most
GPX is open, widely supported, and easy to inspect. It is normally the best input for route visualization, mapping, and printable artwork because the coordinates are the central feature. It may not preserve every metric recorded by your device.
Choose FIT when you need the original record
FIT is compact and designed for fitness devices. It can preserve sensor streams, laps, workout instructions, course points, and device-specific fields. Keep the FIT file as your master copy when data fidelity matters, even if you later create a GPX for another tool.
Choose TCX for training compatibility
TCX is an XML format used by many fitness platforms. It often carries more training detail than a simple GPX while remaining easier for some services to exchange than device-specific FIT data.
Which format should I use for a route poster?
Use GPX when available. A route poster needs a clean track more than it needs heart rate, cadence, or power. If you only have FIT or TCX, convert a copy and compare the route against the source activity before deleting anything.
Avoid common conversion mistakes
- Renaming the file extension does not convert the file.
- Route matching can subtly change the path, especially on trails or new roads.
- Very long activities may exceed an app’s point or file-size limit.
- Indoor workouts often contain no route coordinates.
- Keep the original export so you can retry with different settings.
Privacy checklist
- Inspect the start and finish for home or work locations.
- Share one activity rather than a bulk account archive.
- Use a trusted converter and delete temporary uploads when possible.
- Remember that FIT and TCX may contain biometric data beyond the route.
Platform export guides
- Export GPX from Strava
- Export GPX from Garmin Connect
- Export GPX from Komoot
- Export GPX from COROS
- Get GPX from an Apple Watch workout
Turn the file into something worth keeping
When the route is ready, open the Raceline custom route poster. Upload the GPX, adjust the composition, preview the result, and approve the exact design before it is produced.