Geolocation Simulator

Simulate GPS sensor locations using GeoJSON LineString coordinates

Geolocation Simulator is a developer tool that lets you test location-based web applications by simulating GPS coordinates along a custom route. KEY FEATURES - Import GeoJSON files with LineString geometry - Paste GeoJSON directly from clipboard - Interactive map preview with MapLibre GL JS - Play, Pause, Stop, and Restart controls - Adjustable speed from 0.5x to 5x - Overrides navigator.geolocation API - Side panel mode for persistent access (Chrome 114+) HOW IT WORKS The extension intercepts calls to navigator.geolocation.getCurrentPosition() and watchPosition(), returning simulated coordinates from your imported route instead of your real location. PERFECT FOR - Testing location-aware web applications - Developing delivery or logistics apps - QA testing geofencing features - Demonstrating location-based features - Learning about the Geolocation API GEOJSON FORMAT Import any valid GeoJSON Feature with LineString geometry. Coordinates follow the GeoJSON standard: [longitude, latitude] in WGS84. Create routes easily at geojson.io or export from GPS tracking apps. PRIVACY All processing happens locally in your browser. No location data is sent to external servers. The extension only activates when you enable the Override toggle. REQUIREMENTS - Chrome 88 or later (Manifest V3) - Routes limited to 10,000 coordinates