One quick setup step

You need a free Google Maps API key. Takes about 3 minutes:

1. Go to Google Cloud Console and create a project
2. Enable the Maps JavaScript API
3. Link a billing account (required even for free tier — first $200/mo is free)
4. Go to Credentials → Create API key
5. Paste the key below

Tip: For best results, run via local server. Open Terminal, cd to this folder, then python3 -m http.server 8000 and visit http://localhost:8000.

Load the map

Your key is saved locally in your browser. To reset: open DevTools Console and run localStorage.removeItem('gmaps_key').