numcal. / FIT TOOLS — PLATE 01

Convert FIT, GPX & TCX
without the ceremony.

For Garmin, Wahoo, Coros, Strava files & friends. Free. No signup. Nothing stored — your file is converted in memory and forgotten before the response finishes.

Drop a .fit / .gpx / .tcx file here
or click to browse — up to 25 MB
CONVERT TO

Dedicated instruments

View a filemap, elevation profile, heart rate, power & splits — right in your browser Repair a corrupted FIT filedevice crashed mid-ride? recover the records and rebuild a clean file Merge activitiescombine two or more FIT / GPX / TCX files into one

Supported routes

FIT → GPXshare a watch/bike-computer ride anywhere FIT → TCXkeeps heart rate, cadence & power FIT → CSVevery record, spreadsheet-ready GPX → FITturn a route into a device course GPX → TCXfor apps that only read TCX TCX → GPXold exports, modern apps TCX → CSVfor analysis

Field notes

What is a FIT file?

FIT (Flexible and Interoperable Data Transfer) is the compact binary format Garmin, Wahoo, Coros and most sports devices record activities in. It stores GPS points plus sensor data — heart rate, cadence, power, temperature — far more efficiently than XML formats like GPX or TCX.

Is my data private?

Your file is never written to disk. It is parsed in memory, converted, sent back, and garbage-collected. No accounts, no tracking pixels, no “files are deleted after 24 hours” fine print — there is nothing to delete.

What survives the conversion?

GPS position, elevation, timestamps and distance always. Heart rate, cadence and temperature carry into GPX (Garmin TrackPointExtension), TCX and CSV; power carries into TCX and CSV. FIT course output keeps position, elevation, time and distance — that is what devices read.

Limits?

25 MB per file — roughly a 40-hour recording — and a polite per-minute rate limit so one script can’t hog the server. If you hit either doing something reasonable, tell us.