About GeoJSON Editor

This application is an interactive GeoJSON playground built on top of a Leaflet map. It lets you quickly visualize, validate and edit GeoJSON data without leaving the browser. Just paste your GeoJSON into the textarea and the map will immediately try to render it, showing you whether the structure is valid and what the geometry looks like in space.

The app includes a built-in GeoJSON validator with clear error messages, so if something is wrong in your data, you’ll see exactly what failed (for example, invalid geometry type, broken coordinates or malformed FeatureCollection). Valid data is displayed on the map with labels for points and polygons, and you can easily clear everything with a single click.

You can also draw directly on the map using Leaflet Draw tools (points, lines, polygons, circles, etc.). Anything you draw is automatically converted to GeoJSON and synced back into the textarea, so you can use the map as a simple editor and then copy or save the result as a .geojson file.

For convenience, the app provides example datasets (polygons, lines and points) that you can load with one click to test the behavior or use as templates. There’s also a copy-to-clipboard action and a save function that downloads your current content as a file.

Integrated address search (powered by Placematic) allows you to quickly move the map to a specific location and drop a marker there, making it easier to create or edit GeoJSON around real places. Overall, the tool is designed as a lightweight, practical helper for working with geographic data in everyday workflows.