Repair a broken activity file

TrainingPeaks is different from a casual activity-sharing platform: it derives pace, power, and training-load numbers directly from the points in your file, so a file that's technically readable but internally messy can still produce metrics you shouldn't trust. A corrupted header is the obvious failure — TrainingPeaks will reject the file outright, usually with a generic error that doesn't say what's actually wrong. The subtler problem is a file that TrainingPeaks accepts without complaint but calculates badly from, because the underlying data has gaps or repeats that a stricter platform would have flagged at the door. Missing timestamps mean TrainingPeaks has to guess at pacing across a gap in your recording, which skews interval and lap calculations. Duplicate points make short stretches of your workout look like you stopped moving, dragging down average pace or power for that segment. Out-of-order timestamps can scramble which points belong to which interval entirely. None of these necessarily stop the upload — they just quietly corrupt the numbers TrainingPeaks builds your training analysis on, which matters a lot more here than on a platform where you're just sharing a route. FitFileHub's repair tool checks a file for exactly these defects — corrupted headers, missing timestamps (interpolated back in), out-of-order timestamps (reordered), duplicate points (removed), and both isolated GPS spikes and sustained implausible-speed segments (removed) — and shows you the full list before making a single change. A file that's already clean is reported as fine, not force-altered. The whole process runs locally in your browser, so a workout file with your training data never touches a server to get fixed. Free for files up to 25 MB, three at a time.