Repair a broken activity file

Some points on your track carry a timestamp and some don't — that's the specific problem this page covers, not a file with no time data at all. A route that's timeless throughout, like a planned course or a GPX exported without recording times, is normal and not a defect; FitFileHub leaves it alone. What is a defect is a recording where most points have a time and a handful, scattered through the file, simply don't — often from a device hiccup mid-recording, a merge between two partial exports, or a converter that dropped the time field on some point types while keeping it on others. Missing timestamps matter because so much downstream depends on them: pace, elapsed time, speed graphs, and lap splits are all calculated from the gaps between recorded times, so a hole in the sequence throws off anything computed across it. FitFileHub's repair tool finds the points with no time value and interpolates a timestamp for each, based on the nearest points before and after that do have one, assuming a roughly steady pace across the gap — accurate for the short gaps this defect usually produces, a handful of points rather than long stretches. It reports exactly which points were missing a time before filling anything in, so you can see the extent of the gap rather than trusting the fix blindly. Everything happens client-side — your file is never sent anywhere to be checked or patched. Free for files up to 25 MB, three files per batch, no account or install required.