Your file never leaves your device
The parsing runs entirely in your browser with plain JavaScript. There is no upload, no server call, no storage. You could disconnect your wifi after the page loads and this tool would still work.
⏵ Free tool · No signup
Free GPX Course Analyzer
Drop in the GPX from your next trail or ultra race and get an honest course read: the elevation profile, total gain and loss, the high point, and the biggest climbs. No login, no upload to a server, just your file and your browser.
⏵ Drop your GPX here
Or tap to pick a file. Max 25MB.
The race emailed you a course file when you registered. Drop it here.
Max 25MB · GPX from race websites, watches, or Caltopo all work · parsed in your browser
Parsed in your browser. We keep the result on this device so you can attach it after you sign up.
How this course analyzer works
Every race publishes a GPX file, and most runners never open it until race week. Here is what this tool actually does with it.
What you get for free
Total distance, total elevation gain and loss, the high point, the full elevation profile chart, and the three biggest climbs on the course with their length, gain, and average grade. That is the honest terrain read, no strings attached.
What the paid plan adds
Summit Line takes the same file and builds a segment-by-segment race plan: pace and effort for every mile, where to power-hike, aid-station arrival windows against your cutoffs, and a fueling plan by segment. That is the part this free tool does not do.