Required before conversion. Resting HR and Max HR are required only when HR zone analysis is included. Warm-up and Cooldown are used for steady-window Drift % only: they auto-set to 10 minutes for Workout / Structured Session and 0 minutes for Free Ride so the main body of the ride is analysed.
Drop your .fit file here
or click to browse. Add required athlete context first, then convert when ready.
Why Convert a FIT File for AI Coaching?
If you want to use an AI assistant as a cycling coach or training analyst, basic ride notes will only take you so far. For a more accurate and evidence-based review, the coach needs access to the performance data behind the ride: power, cadence, heart rate, speed, elevation, lap data, and other metrics.
The best source for that data is usually the .FIT file recorded by your bike computer, watch, smart trainer, or training platform. However, FIT files are binary files, which means they are not easily readable by people and may not be interpreted correctly by an AI tool.
This converter extracts the key cycling performance data from the FIT file and presents it as structured, readable text. That output can then be copied into an AI assistant, shared with a coach, or reviewed manually to support a more complete analysis of the rider's performance.
FIT File Converter FAQ
What is a FIT file?
A FIT file is a compact binary workout data file used by many cycling computers, watches, smart trainers, and fitness apps. FIT stands for Flexible and Interoperable Data Transfer, a Garmin-developed protocol for storing sport, fitness, and health data such as power, heart rate, cadence, speed, altitude, laps, and workout summaries.
Why convert a FIT file to text?
FIT files are binary, so they are not normally readable by humans or directly usable by most AI clients. Converting a FIT file into structured text makes the workout data easier to review, share with a coach, or paste into an AI tool for ride analysis.
Can I use the output with ChatGPT or another AI tool?
Yes. The output is designed to be copied into an AI assistant or shared with a coach. It gives the model structured ride data so it can produce a more useful workout review.
Can I convert Garmin or Wahoo FIT files to text?
The converter is designed for cycling .fit files and should work with many exports from Garmin, Wahoo, Strava, ROUVY, and similar platforms. Exact fields can vary between devices and apps, so some values may appear as N/A if they are not included in the file.
Does this upload my workout data?
No. The FIT file is parsed locally in your browser. The converter does not upload your cycling workout, athlete context, or ride notes to a server.
What does the converter extract from a FIT file?
It creates a structured text report with ride summary data including duration, distance, ascent, calories, speed, power, heart rate, and cadence. It can also include lap-by-lap breakdowns, power and heart rate distributions, detected climbs, VO2 surges, sustained tempo blocks, fatigue markers, and coach-ready training notes.
Why are some fields shown as N/A?
Some FIT files do not include every possible data field. Indoor trainer files, for example, may not include GPS, real altitude, or certain lap metrics. When a value is missing, the converter shows N/A rather than guessing.