FIT File Crop
Upload your .FIT file, set start and end times with precise time inputs or quick presets, and download a clean cropped version in .FIT, GPX, or CSV format.
Drag & drop your FIT files here
or click to browse — max 50 MB
How to Use
1. Upload Your FIT File
Drag and drop your .FIT file or click to browse. Your file is not uploaded anywhere — all processing happens in your browser.
2. Adjust the Crop Range
Use the time inputs, slider, or quick preset buttons (±1 min / ±5 min) to select exactly which part of the activity to keep. The chart shows you the data with excluded regions dimmed.
3. Download Your Cropped File
Choose your preferred format: .FIT (universal, works with Garmin Connect), GPX (GPS format for maps), or CSV (spreadsheet).
FAQ
How do I crop a FIT file?
Upload your FIT file, then use the time inputs or slider to select your desired start and end points. Use the quick preset buttons (±1 min, ±5 min) for faster adjustments, or type exact times like "0:05:00" and "1:18:30". The chart shows you exactly what will be cropped.
What output format should I use when exporting?
.FIT is the universal format compatible with Garmin Connect, Strava, and all fitness apps. Use GPX if you want to view the route on a map app or in a map editor. Use CSV if you want to analyze the data in Excel or a spreadsheet.
Can I re-upload a cropped .FIT file to Garmin Connect?
Yes. The cropped .FIT file is a valid FIT file that Garmin Connect will recognize and accept. Your device information and all metadata are preserved, just with the cropped time range and fewer data points.
Will cropping affect my training metrics (TSS, IF, calories)?
Yes. Cropping changes the data used to calculate training metrics. If you crop significant portions, metrics like total calories, training stress score, and intensity factor will be recalculated based on the remaining data. This is useful if you want to analyze only a specific part of your workout.