Overlay your Strava heatmaps on Mapy.com — the global heatmap split by sport (MTB / Gravel / Road / Run, in hot) plus your own personal heatmap (in blue), shown together over the real map. Find the roads and trails you've never ridden or run yet — on the map with the best route planning around.
New — Sync to Strava: plan a route on Mapy.com and push it to your Strava account in one click (always private and starred). From there it flows to your Garmin / Wahoo on the next device sync. (Strava subscription required.)
🌐 heatmapy.com · 🧩 Get it on the Chrome Web Store · ☕ Buy me a coffee
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The global heat shows where everyone goes; your personal heat (blue) shows where you've already been. Together they make the good lines obvious — and the ones you still haven't explored. That's the whole point of planning. Per-sport MTB / Gravel / Road / Run layers mean it's not just for cyclists. And Mapy.com's outdoor + aerial maps and route planner beat the usual map apps for this.
You need to be logged in to Strava in the same browser. A Strava Subscription is required for the global heatmap above zoom 11, your personal heatmap, and Sync to Strava (saving a planned route to your account). The low-zoom global heatmap, route planning, and the plain GPX download work on a free account.
➡️ Install Heatmapy,
pin it, then open Mapy.com. Make sure you're logged in to
Strava in the same browser (open strava.com once). Click the extension icon →
it auto-detects your athlete ID (or paste it from your strava.com/athletes/<id>
profile URL).
- Clone/download this repo.
- Chrome →
chrome://extensions→ enable Developer mode (top right). - Load unpacked → select the
extension/folder. - Log in to Strava in the same browser, then open Mapy.com.
On-map panel (bottom-left):
- Sport — pick the discipline: Road / MTB / Gravel / Run. Both layers follow it.
- Global — independent on/off for the crowd heatmap.
- Personal — independent on/off for your heatmap.
- ⏻ — master mute: hides everything at once (your per-layer choices are remembered) and brings it all back.
- Opacity slider — one control for both layers.
- Sync to Strava — saves your planned Mapy route to your Strava account as a Route (requires a Strava subscription), always private and starred. From there it syncs to your watch / bike computer — see below.
- ⬇ — plain GPX download (no account needed), to import manually.
The global and personal layers toggle independently, so you can show your personal heat on its own, the global heat on its own, both, or neither.
Keyboard: A all on/off · S cycle sport · D global · F personal ·
[ / ] opacity. When planning a route, ⌘-click (Mac) / Ctrl-click (PC) the
map to add a point.
The fast path is Sync to Strava (one click), then let your device pull it from Strava — both brands do this once you've linked them one time:
- Garmin: connect Strava in Garmin Connect (Strava route sync). New Strava routes then auto-appear in Courses on your Edge/watch on the next sync.
- Wahoo: in the Wahoo app, link your Strava account under route providers. Your Strava routes show up in the app and sync to the ELEMNT over Wi-Fi.
(Uploading a GPX as a Strava route is a Strava subscriber feature; free accounts can use the ⬇ GPX download and import manually instead.)
- A service worker (
background.js) fetches Strava heatmap tiles with your logged-in cookies (host_permissionsfor*.strava.com) — content scripts can't do credentialed cross-origin fetches in MV3, the worker can. content.jsrenders two stacked tile layers over Mapy's map, caches global tiles in IndexedDB (instant on reopen) and everything in memory, and canvas-recolors the personal tiles (Strava serves them as opaque black) to a transparent blue overlay.- Endpoints: global
content-a.strava.com/identified/globalheat/sport_*/hot/..., personalpersonal-heatmaps-external.strava.com/tiles/<athleteId>/....
The web app's content-*.strava.com/identified/globalheat/sport_<X>/... endpoint
serves per-discipline heat — sport_Ride (road) vs sport_MountainBikeRide —
which the public heatmap-external/.../ride/... tiles do not (those aggregate
every ride sub-type into ride). S cycles MTB → Ride → Run, and the personal
layer (D) follows the same discipline. This needs your logged-in Strava cookies
(and a subscription for z>11); the official Strava API can't help — the heatmap is
an internal tile service outside the public API.
The extension only talks to Strava (to fetch your heatmap tiles, using cookies already in your browser) and stores small settings locally. It sends nothing to any third party. See PRIVACY.md.
If Heatmapy saves you time on the bike, buy me a coffee ☕. Found a bug or have an idea? Open a GitHub issue — it's actively maintained.
Independent project — not affiliated with Strava or Mapy.com.