GeoJSON Simplify
LocalSimplify GeoJSON vertices with fast (Douglas-Peucker) or topology-preserving mode (no gaps on shared edges) to reduce file size, locally in your browser.
What is it? GeoJSON Simplify reduces vertex counts with Douglas-Peucker simplification to shrink files while keeping the shape.
TL;DR: Simplify GeoJSON with Douglas-Peucker.
How to use
- Open a GeoJSON layer.
- Set the tolerance.
- Download the simplified GeoJSON.
FAQ
How do I choose a tolerance?
Tolerance is in degrees for WGS84 data; start small and increase.
Is it local?
Yes.
Limitations
- Tolerance is in coordinate units, not meters, for geographic data.
- Simplify is geometric only.
- Topology-preserving mode (shared edges stay aligned) is available alongside fast Douglas-Peucker.
Privacy
Privacy first: this tool runs entirely in your browser. Your input and files never leave your device.