Workout Interval Lap Injector - Auto-Generate Track & Distance Laps
Split continuous track workouts into crisp 400m, 1km, or 5-minute interval laps with dedicated GPX trkseg and TCX Lap markers.
How to Use Interval Lap Injector 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 add 400m track laps to a continuous run file?
Yes. FitCrop automatically measures cumulative distance and places split markers every 400m or 1km so Strava displays interval tables.
Does lap injection modify my original GPS points?
No. All original GPS coordinates, heart rate, and cadence records remain 100% intact.