GeoJSON Optimizer

Five decimal places gives accuracy to about 1 metre. Six decimal places gives about 10 cm. For most web map use cases, 5–6 decimal places is more than adequate.

You can choose to remove all non-essential properties, specific named properties, or just null/empty values. The geometry is never altered unless you reduce coordinate precision.

A GeoJSON exported from QGIS with 15-decimal-place coordinates can often be reduced 30–50% just by trimming to 6 decimal places. Removing unused properties can add further savings.

At 5+ decimal places the visual difference is imperceptible for web maps. The geometry will appear identical at all normal zoom levels.

No. All optimisation is done client-side in your browser. Your data never leaves your device.