How Browser Location Works
Browser location uses your device's GPS, nearby Wi-Fi networks, cellular towers, and IP address — usually all combined — to estimate your position. The Geolocation API returns the result to a website only after you grant permission.
Browser geolocation is a coordinated effort across GPS, Wi-Fi, cellular signals, and IP addresses, all wrapped in a single permission-gated API.
The four signal sources
Modern devices combine four independent location signals. GPS uses satellite trilateration and is the most accurate (often within 5 meters outdoors). Wi-Fi positioning queries the BSSID of nearby networks against a known-locations database (Google's and Apple's are the largest). Cellular triangulation uses signal strength from cell towers. IP-based geolocation infers your rough region from your public IP address.
The permission model
Browsers wrap all four signals behind a single Geolocation API. When a website calls navigator.geolocation.getCurrentPosition(), the browser intercepts the call and shows a permission prompt. Until you click "Allow", the site sees nothing. After "Allow", the browser returns a combined estimate.
Why it sometimes feels slow
The first call from a cold start can take 5–15 seconds, especially indoors or in rural areas where GPS signal is weaker. Subsequent calls within a short window are typically instant because the result is cached briefly.