GPX on your trainer

Ride any GPX route
on your smart trainer

A route from Komoot or Strava, a stage you are training for, the loop outside your door — drop the GPX file into WattLog.pro and your trainer rides it with you. Free, no subscription, and nothing to install in Chrome or Edge.

Ride a GPX file free → Get the app

How it works

  • Get the file. Export a GPX or TCX from Komoot, Strava, Garmin Connect or RideWithGPS — or pick a route from the WattLog.pro library.
  • Drop it in. Before you start, WattLog.pro draws the route on a map with its elevation profile, distance and climbing.
  • Ride. Pair your trainer and go. The resistance follows the gradient under your virtual wheel — every 50 metres, keyed to the distance you have ridden, not to a clock.

Two ways to ride a route

SIM

The real road

SIM mode sends the route's gradient to your trainer. You choose the gear and the effort, your speed comes from your watts, and a climb lasts as long as your legs make it last.

ERG

A workout shaped like the route

Short on time? Turn a saved route into an ERG workout: each stretch becomes a block at a share of your FTP set by its gradient, compressed into the minutes you have and capped at the zone you choose. A 160 km route fits into a 60-minute session.

What you need

  • A Bluetooth (FTMS) smart trainer that sets its own resistance — virtually every smart trainer made since 2018. Check your model.
  • Chrome or Edge on a computer, or the app for macOS, iOS or Android. Devices and browsers.
  • A GPX or TCX file up to 8 MB, with elevation in it. A file without elevation rides flat.
  • Nothing else. WattLog.pro is free — no subscription, no trial, no credit card. Not ready for an account? Start as a guest.

No file? Start from the library

The route library in the app holds hundreds of official cycle routes — EuroVelo plus national and regional networks in Poland, Germany, Austria and Switzerland — with elevation from the Copernicus DEM, ready to ride.

Training for something steeper? Our famous climbs — Alpe d'Huez, the Stelvio, Mont Ventoux and more — come with a climb-time calculator and a link to ride them on your trainer.

Questions

Is it really free?↓

Yes. Route import, SIM and ERG rides, the route library and the post-ride analysis are all free. WattLog.pro is funded by supporters, not subscriptions.

Which files work?↓

GPX and TCX up to 8 MB. Garmin FIT files can't be imported as a route yet — export the course as GPX instead. Strava, Komoot, Garmin Connect and RideWithGPS all offer GPX export.

Does my trainer follow the gradient exactly?↓

It follows the gradient your trainer can produce. Direct-drive trainers typically simulate 15–25%, wheel-on trainers less. WattLog.pro smooths the elevation profile and sends a new gradient every 50 metres, so GPS noise doesn't turn into sudden walls.

Can I ride without saving the route?↓

Yes. Ride straight after the preview, or save the route to find it under Routes later. Turning a route into an ERG workout needs a saved route.

Ride your first route tonight

Pick a GPX, open WattLog.pro in Chrome or the app, pair your trainer. The whole setup takes about as long as filling your bottle.

Ride a GPX file free →