> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/help/llms.txt)

# simplestyle

**Simplestyle** is an open source specification for styling [GeoJSON](https://docs.mapbox.com/help/glossary/geojson/) data. GeoJSON overlays in the [Static Images API](https://docs.mapbox.com/api/maps/static-images/) also use the Simplestyle specification. The simplestyle specification can also be used to style GeoJSON at [geojson.io](https://geojson.io)

**Related resources:**

-   [Simplestyle specification](https://github.com/mapbox/simplestyle-spec)
-   [Static Images API overlay documentation](https://docs.mapbox.com/api/maps/#overlay-options)