Merge, repair and convert activity files
Upload the recordings of a ride or run — from one device or several. FitMerge checks every file first, then joins them in time order, merges them stream by stream (you pick which device provides GPS, heart rate, power…), repairs a damaged FIT, and shows you the totals before you download.
Drop your FIT, GPX or TCX files here — or tap to choose files
Free plan: up to 2 files, 5 MB each — no account needed to try. Files are deleted after 24 hours.