Trim an activity

The most common reason to trim a route isn't tidying up data — it's privacy. Plenty of activities start or end at a home address, and posting the full track publicly on Strava or a training log means anyone can trace the last few hundred metres back to a specific front door. Trim solves exactly that: cut a chosen stretch of points from the beginning of a recording, the end, or both, leaving the rest of the activity untouched. You choose the cut point directly against the route, so it's straightforward to trim right up to the point where you left your street and stop there, rather than guessing at a time offset or a point index in the raw data. Everything about the recording that isn't in the trimmed section stays exactly as recorded — no resampling, no smoothing, no change to the timestamps or sensor values on the points you keep. This is deliberately a narrower tool than repair or split: it doesn't try to detect anything wrong with the file, it just removes a range you specify, which makes it the right choice when the file itself is fine and the only issue is that part of it shouldn't be shared. It works across the formats this site supports, so a FIT file straight off a watch or a GPX export both trim the same way. As with the rest of FitFileHub, the cutting happens entirely inside your browser — the untrimmed file, home address and all, is never sent anywhere to produce the shorter version, which is precisely the point when privacy is the reason you're trimming in the first place. Free for files up to 25 MB, three at a time.