Free GIS & Remote Sensing Tools

A growing suite of fast, free, browser-based utilities for surveyors, drone operators, GIS analysts and developers. Nothing is uploaded — everything runs locally.

Coordinate Converter

DD ↔ DMS ↔ UTM ↔ MGRS. Convert between coordinate systems instantly.

Format Converter

GeoJSON ↔ KML ↔ GPX ↔ CSV. Convert geo files in your browser.

Measure on Map

Measure distance, area and perimeter by drawing on a map.

GeoJSON Viewer

Paste, view and validate GeoJSON on an interactive map.

EPSG / CRS Lookup

Search coordinate reference systems and reproject coordinates.

Bounding Box Tool

Draw or enter a bbox; get it in comma, GeoJSON, WKT and Overpass formats.

Tile & Quadkey Calculator

Convert lat/lon/zoom to XYZ tiles and Bing quadkeys, and back.

GSD Calculator

Drone ground sample distance (cm/px) and footprint from sensor specs.

Geodesic Calculator

Distance, bearing, midpoint and destination on the WGS84 globe.