tracé — cycling GPX route analyzer

Drop in a cycling GPX file and read the route: an interactive map, a grade-colored elevation profile, every climb categorized Cat 4 to Hors Catégorie, FIETS difficulty, grade distribution and pacing. The analysis runs entirely in your browser — your route is never uploaded, there is no account, and there is no database behind this page.

What it does

• Map and elevation profile linked both ways — hover either and the other follows.
• Distance, elevation gain and loss, average and steepest grades, terrain split.
• Automatic climb detection, categorized Cat 4 → HC, with a sortable table.
• FIETS difficulty score and a grade-distribution histogram.
• Drag anywhere on the profile for statistics on just that section.
• Physics-based pacing and ETA for road or gravel, from your own weight and W/kg.
• Recorded rides also get moving time, speed bands, VAM, estimated W/kg per climb, heart-rate recovery and within-ride fatigue.
• Optional surface classification, OpenStreetMap points of interest, and wind-impact analysis.
• Works with GPX exports from Strava, Garmin, Komoot, RideWithGPS and anything else that writes GPX 1.1 — or paste a Komoot tour URL.

Private by construction, not by promise

There is no upload step to opt out of. The file is read by JavaScript on your own machine and the results stay there. Sharing a route puts the whole compressed route in the fragment of a link — the part after the # that browsers never transmit — so the recipient decodes it locally and no server, including this one, ever sees it. The only server-side code in the project is a stateless relay for OpenStreetMap queries, used only if you switch on the map's optional layers.

Open the app

Load a GPX file — or try the built-in demo route, a real 147 km ride through the Odenwald with eleven categorized climbs. Machine-readable summary: llms.txt.

tracé requires JavaScript to analyze a route.