What algorithm does this use?

Ramer-Douglas-Peucker, the standard line/polygon simplification algorithm (via Turf.js).

GeoJSON Simplify

Reduce the number of points in a GeoJSON line or polygon (Douglas-Peucker).

Paste GeoJSON

Tolerance

High quality

{
  "type": "Polygon",
  "coordinates": [
    [
      [
        -122.43,
        37.77
      ],
      [
        -122.42,
        37.77
      ],
      [
        -122.42,
        37.78
      ],
      [
        -122.43,
        37.78
      ],
      [
        -122.43,
        37.77
      ]
    ]
  ]
}

Runs entirely in your browser - nothing is sent to a server.

Related tools

GeoJSON Bounding Box
GeoJSON Centroid
GeoJSON Area Calculator
GeoJSON Line Length

How it works

1
Paste GeoJSON

Paste a LineString, Polygon or MultiPolygon.
2
Set a tolerance

Higher tolerance removes more points.
3
Copy the result

The simplified GeoJSON is generated instantly.

FAQ

What algorithm does this use?: Ramer-Douglas-Peucker, the standard line/polygon simplification algorithm (via Turf.js).