Coordinates to KML Converter — Free, In-Browser, with Altitude

What the KML actually contains

KML stores every position as longitude,latitude,altitude — the reverse of how people say it out loud. Getting that order backwards is the single most common fault in home-made converters, and it puts your points in the Gulf of Guinea instead of Gujarat. This tool always writes the tuple correctly and always emits an altitude value, because Google Earth handles a two-value tuple inconsistently between versions.

Three geometries, one input

The same coordinate list can export as points (one placemark per row), a path (a LineString joining them in order), or a polygon (a closed area, with the enclosed size reported in km², hectares and acres). A KML LinearRing has to repeat its first vertex to close — that is handled for you.

Altitude mode, and why it matters

clampToGround ignores height and sits the point on the terrain. relativeToGround measures from the surface upward, which is what you want for obstacle heights and drone AGL limits. absolute measures from mean sea level, which is what survey and flight-level data uses. Choosing wrong will silently move a 200 m tower hundreds of metres vertically.

Notations you can paste

Decimal degrees (28.6139, 77.2090), DMS (28°36'50"N, 77°12'32.4"E) and DDM (N28°36.833', E077°12.540') are all recognised, and you can mix them in one paste. DDM is the notation printed on aeronautical charts, and it is the one most converters cannot read. Add altitude and a label after the pair: 28.6139, 77.2090, 216, Tower A.

Working the other way? Use the KML to CSV converter. Just need to change notation? The coordinate converter does that without producing a file.