Merge Split Activities Online - Combine FIT & GPX Files Seamlessly
Did your watch reboot mid-marathon or bike ride? Merge split parts into one clean file with zero gap penalties and chronological continuity.
How to Use Merge Split Files in 3 Simple Steps
Step 1: Upload
Drag & drop your .FIT, .GPX, or .TCX activity file. All processing is 100% private in your browser.
Step 2: Process
FitCrop inspects telemetry streams, removes anomalies, recalibrates metrics, or fixes binary checksums.
Step 3: Export
Download your clean Strava, Garmin, and Zwift compatible file with 1 click. Zero server wait.
Frequently Asked Questions
Can I merge a GPX file with a FIT file?
Yes. FitCrop reads and harmonizes both FIT and GPX formats into a unified chronological stream.
How does FitCrop handle time gaps between two activity parts?
FitCrop chronologically stitches the trackpoints and recalculates cumulative elapsed and moving times so Strava displays continuous total mileage.