Geofence Map — Draw and Export a Geofence
A geofence is a virtual boundary drawn on a map. Click the corners of your boundary here, get the full vertex coordinates plus area and perimeter, and export the fence in the formats geofencing platforms actually accept — GeoJSON, KML and CSV. Free, no signup.
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Click corners of the geofence in order · the boundary fills from 3 corners · drag any corner to reshape · exports work with Google Earth, My Maps and most geofencing platforms.
What is a geofence used for?
Fleet & delivery. Define the zone a driver should stay inside (or leave) — warehouses hand these coordinates to telematics platforms to trigger arrival and departure events.
Security & cameras. CCTV and alarm systems accept polygonal zones: draw the exact area that should trigger motion alerts instead of fighting with radius presets.
Marketing & apps. Location-based push notifications use polygon geofences around stores and venues; the exported vertex list plugs straight into most mobile SDKs.
Property & agriculture. Document the boundary of a plot, a field or a no-go zone and share it as a file others can import.
How to create a geofence on a map (3 steps)
- Draw the boundary. Zoom to your area and click each corner of the fence in order — the boundary fills in from three corners.
- Refine the shape. Drag any corner onto the exact boundary point; undo removes the last corner if you overshoot.
- Export and use. GeoJSON for APIs and mapping platforms, KML for Google Earth and My Maps, CSV for spreadsheets, PNG for documents.
Radius fence vs. polygon fence
A radius geofence is one number — “everything within 2 km of this point” — and the radius map tool draws it. A polygon geofence traces an irregular boundary: a warehouse district, a farm, an irregular city block. Choose a polygon whenever the real-world boundary isn't circular; choose a radius when it is. The area calculator covers pure area measurement without the fence framing.
Note what this tool does not do: it draws and exports the boundary — the “trigger when a device enters or exits” part happens in whatever platform you import the fence into. Coordinates are WGS84 decimal degrees.
Frequently asked questions
What is a geofence in simple terms?
A virtual boundary drawn on a map. Software watches whether a phone, vehicle or sensor crosses that boundary and can trigger an action — an alert, a notification or a logged event.
What format should I export my geofence in?
GeoJSON for developer platforms and APIs (it is the de-facto standard), KML for Google Earth and Google My Maps, CSV for spreadsheets and manual entry. All three export from this tool with the same vertex coordinates.
How many corners can a geofence have?
As many as you need — real boundaries are rarely rectangular. More corners mean a closer match to the true boundary; there is no practical limit in the tool.
Is a geofence the same as a radius?
No — a radius fence is a perfect circle defined by one point and one distance. A polygon geofence traces an irregular boundary corner by corner, which matches real-world shapes far better.
Does this tool monitor when someone enters or exits?
No — it draws and exports the boundary. The enter/exit triggering runs in whatever platform you import the fence into (a telematics system, a mobile SDK or a security platform).
Is the geofence tool free?
Yes — free with no signup or usage limits, like every tool on this site. It is funded by display advertising.
Page last updated . Data sources and methodology are described in the sections above and in About.
Explore more map tools
Radius Map
Draw circular fences in miles or kilometers.
Area Calculator
Measure any plot's area in acres and square feet.
Population Within Radius
Census headcount inside any circle.
Start with the geofence tool above — free, no signup, no usage caps.