100% private — files never leave your browser
GPS track tools that run in your browser
Convert FIT, GPX and TCX files, merge or split activities, repair a damaged FIT file, and preview any track on a map.GPX Converter processes everything locally on your device — your training data is never uploaded anywhere.
Convert
Switch between Garmin FIT, universal GPX and Training Center TCX — heart rate, cadence and power included.
Merge, split & repair
Combine multi-part recordings, split a long activity into segments, or repair a FIT file with a bad header, CRC or truncated ending.
Preview
Open any GPS file and see the map, distance, elevation and pace — no account, nothing uploaded.
Why browser-only matters
Private
Your files are parsed by JavaScript on your own device. There is no upload step, no server-side processing and no storage — the math makes uploading impossible.
Fast
No queue, no waiting for a round trip to a server. A conversion starts the moment you drop a file, even on a plane or with no signal.
Unlimited
No accounts, no daily caps, no file-size paywalls. Batch your whole training history through in one sitting if you like.