Open a cycling .fit file — power, cadence and left/right balance
Cycling is the richest sport in the FIT format: a power meter and a head unit together write more distinct fields than any other activity, and most tools show only the first few.
Open your file
Drop your file here
a .fit file from a watch or bike computer
No account. No upload. The file is read on this device and never leaves it.
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Beyond watts
A direct-force power meter records more than a single power number. Depending on the model, a cycling .fit file can carry left/right power balance, torque effectiveness and pedal smoothness per leg, and the accumulated work in kilojoules. These sit in the record messages beside speed and heart rate, and they are where the answer to “is my left leg doing more” actually lives — but only if your meter is dual-sided, which the file tells you and a spec sheet does not.
Speed from a sensor or from GPS
A bike with a speed sensor on the wheel reports distance from wheel revolutions and your set circumference, which is more precise than GPS and completely wrong if the circumference is misconfigured. Without a sensor, speed comes from GPS. The file records which, and a distance that is consistently a few percent off is usually a wheel-size setting, not satellite error — the cycling equivalent of the pool-length trap.
What you get from this page
This page reads your ride on your device and inventories every field your meter and head unit wrote — the power sub-fields included — so you can see what the file actually captured rather than what a generic viewer chose to display.
In the corpus this tool is tested against, 1,305 activities resolved to this sport. See the full activity-type list for every sport a .fit file can declare, and open any .fit file whatever its sport.