Small, fast utilities for anyone working with coordinates and boundaries. Everything runs in your browser — no accounts, no uploads, no limits.
Draw a zone on a map and export it as GeoJSON — no account needed.
Open tool →Paste GeoJSON to render it on a map and catch errors before they ship.
Open tool →Measure the real-world area and perimeter of any shape on a map.
Open tool →Draw a circle of a given radius around any point and export it.
Open tool →Convert between decimal degrees, DMS, and degrees-decimal-minutes.
Open tool →Great-circle distance and bearing between two GPS coordinates.
Open tool →Geoblip is a geofence alert service, so we spend a lot of time with polygons, coordinate formats, and the small number of mistakes that cause almost all geofencing problems — swapped latitude and longitude, unclosed polygon rings, and boundaries drawn tighter than GPS accuracy allows.
The tools above are the checks we wanted available without opening a desktop GIS package or signing up for anything. They're free, they run entirely client-side, and nothing you paste into them leaves your browser.
If you need a boundary that actually notifies you when something crosses it, that's the product — see how it works or look at pricing.