Split an activity in two

Sometimes one recording actually covers two separate activities — you forgot to stop the watch at the end of a ride before starting a run, or a long day out is really a warmup and a main effort that you'd rather log and analyze separately. Split takes one file and produces two from it, breaking at a point you choose in whichever way is easiest for the situation: a specific time into the recording, a specific distance covered, or simply clicking the point on the map where the split should happen, which is often the fastest option when the natural break point is a location — the top of a climb, a trailhead, the spot where you turned around. Both resulting files are complete, independent activities in their own right, each keeping the sensor data, timestamps, and elevation for its portion of the original recording, so neither one comes out as a stripped-down fragment of the other. This is effectively the mirror image of merge, which does the opposite job of combining files, and the two are often used together — split a mis-recorded activity into its real pieces, then merge the correct piece with a separate recording of the same effort if one exists. Split works across the formats this site handles, so a FIT file, a GPX track, or any of the others can be divided the same way. The whole operation happens locally, inside your browser, with no upload involved at any point — the file being split, along with wherever your route happens to have gone, never leaves your device. Free for files up to 25 MB, three per batch.