FIT editors
Shift clocks, strip fields, boost power, stitch split rides — all locally.
Files stay on this device
- Time adjusterShift or set the activity clock
- File combinerJoin split recordings into one FIT
- Section removerCut a stretch out of a FIT
- Field mergerCopy HR, GPS, or power between files
- Field stripperRemove power, HR, GPS, and more
- Peak removerCap wild HR or power spikes
- Power boosterScale or offset power meter data
- Break fillerFill pauses with rest records
- Corrupt timeFix timestamps that jump into the future
- Elevation setterRescale climbing to a target gain
- Sport changerRewrite sport / sub-sport
- Device changerChange manufacturer / product
- Start extenderAdd the missing beginning of a ride
- FIT inspectorRaw session summary as JSON
Questions
Do these tools rewrite the original on disk?
No. You download a new FIT. Keep the original if you still want it.
Will Strava change the activity I already uploaded?
No. These files are local. Re-upload the download as a new activity if you need the platform copy changed.
Can I inspect a file first?
Yes. FIT inspector writes a JSON summary without changing the activity.