Geo Tools

Work with geographic data: convert formats, validate coordinates, calculate distances, and process spatial data—fast, accurate, and private.

20 tools available

Calculators 1

Math Calculators 1

Haversine calculator

Compute great-circle distance and initial bearing between two GPS coordinates with the haversine formula. Choose km, miles, or nautical miles.

Geography & Mapping Tools 16

Area & Perimeter

Geodesic polygon area calculator: WGS84 lat/lon or planar survey X/Y. Land parcel area, perimeter, Shoelace centroid in hectares, acres, m².

Route Distance

Free route distance calculator: great-circle (Haversine) distance and initial bearing for multi-point GPS routes. Get km, miles, and nautical miles per segment.

Reverse Geocoder

Free reverse geocoder: convert decimal or DMS GPS coordinates (lat/long) to street addresses via OpenStreetMap/Nominatim, with ISO 3166 region context.

Address Geocoder

Free address geocoder: convert any address to GPS coordinates (latitude/longitude). Get precise location data from street addresses, places, and landmarks instantly.

Geometry Tools

GIS geometry toolkit for pros: buffer (planar), simplify via Douglas-Peucker to cut vertices, clip GeoJSON/WKT by bbox or polygon, with area & length metrics.

Polygon Calculator

Free GIS polygon area calculator: geodesic area, perimeter, centroid and edge bearings from GeoJSON/WKT or map drawing on WGS84 (EPSG:4326) lat/lon.

WKT GeoJSON Converter

Free WKT GeoJSON converter: convert WKT, EWKT and PostGIS output to/from GeoJSON FeatureCollection in WGS84. Validate and visualize geometries online.

Geohash Encoder Decoder

Geohash encoder/decoder for Redis GEO, MongoDB and PostGIS: lat long to geohash and back, auto-pick precision for a radius, copy covering prefixes as SQL WHERE.

Plus Codes

Free open-source Plus Codes tool: encode/decode Open Location Codes, recover short & compound codes, see true cell size in meters. No street address needed.

UTM / MGRS Converter

Free WGS84 UTM MGRS converter: lat long to UTM, MGRS at 1 m precision and 6/8/10-digit NATO grid reference. Batch CSV conversion for surveyors.

Distance & Bearing

Great-circle distance, forward/back bearing, midpoint and destination point between GPS coordinates. Results in km, miles and nautical miles. WGS84 ready.

Coordinate Converter

Free WGS84 GPS coordinate converter: instantly switch DD, DMS, DDM, UTM and MGRS. Bulk paste, use my location, export CSV, KML, GPX and GeoJSON.

CSV to GeoJSON

Free online CSV to GeoJSON converter (RFC 7946, WGS84/EPSG:4326). Map lat/lon columns, trim coordinate precision, preview on Leaflet. Private, browser-side.

Carbon Footprint Calculator

Free carbon footprint calculator for your household. Track CO2 emissions per year from transport, flights, home energy, diet & shopping, plus offset cost.

GeoJSON Validator

Free RFC 7946 GeoJSON validator and repair tool. Check syntax, fix polygon winding order (right-hand rule), close rings, validate WGS84 bounds, and reduce coordinate precision.

KML/GPX Converter

Free KML to GeoJSON, GPX to GeoJSON & GeoJSON to KML converter. Convert GPS tracks, preview on a map, and get distance and elevation stats instantly.

Hardware Tools 1

Sensors 1

GPS Location Viewer

Free GPS test in your browser: check location accuracy, TTFF, altitude and speed live, record a track, and export it as GPX, CSV or JSON.

Time Tools 2

Equinox & Solstice

Find exact UTC dates and times of equinoxes and solstices from 1800 to 2200, convert to your timezone, and export an .ics calendar file for any year range.

Sun Path

Plot the sun path diagram, golden hour, solar altitude and azimuth for any date. Get peak noon altitude, shadow ratio and panel tilt for solar and photo work.