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Free GIS Tools

Professional-grade tools for field workers, surveyors, and GIS analysts. Everything runs in your browser — no signup, no server, no tracking.

Coordinate Converter

Convert between Decimal Degrees, DMS, and UTM. Full WGS84 math with sub-millimeter accuracy.

DD · DMS · UTM

Distance & Bearing

Calculate great-circle distance and initial bearing between two GPS coordinates. Haversine formula.

km · mi · m · bearing

Area Calculator

Calculate polygon area and perimeter from coordinates. Results in acres, hectares, sq ft, and more.

acres · hectares · sq ft

Slope & Grade

Calculate slope percentage, angle, and ratio from elevation data. Visual diagram and terrain classification.

grade · angle · ratio

Map Preview

Drop points or paste GeoJSON and see them on a real Leaflet map instantly. Click map to grab coordinates.

Leaflet · GeoJSON · Points

Tree Strike Distance

Calculate if a tree can strike a powerline using Pythagorean theorem. Essential for vegetation management.

a²+b²=c² · clearance · safety

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