When Strava or another training platform rejects a .fit file, FIT Repair Studio helps you inspect the activity, repair common CRC/checksum issues, edit selected record fields, and save a repaired copy locally on your Mac.
A focused native Mac utility for athletes, coaches, and data-focused users who need to recover malformed FIT activities without uploading private files to a web service.
Detect invalid FIT file checksums and recalculate header and file CRC values where the activity data is still structurally readable.
Browse parsed FIT record data in a table and edit selected fields before saving a repaired copy for another upload attempt.
Useful for cyclists, runners, triathletes, coaches, and Bryton/Garmin/Wahoo/COROS users who need to recover workouts instead of losing them.
FIT files are opened and repaired by the macOS app on your computer. The website does not upload, parse, or store your activity files.
FIT Repair Studio is a notarized macOS app for Apple Silicon and Intel Macs. The utility runs locally to protect your private GPS and training data. No signup, no account, no file upload.
Version 1.0.1. Notarized Developer ID build for Apple Silicon and Intel Macs.
Current macOS build focused on private local FIT repair and recovery workflows.
The macOS app is written in Swift and packaged with SwiftPM scripts for local builds, Developer ID signing, and Apple notarization.
git clone https://github.com/bradacz/FITRepairStudio.git
cd FITRepairStudio
# Compile and run the macOS app locally
./script/build_and_run.sh