Simple Coordinate Picker and GeoJSON Export Tool

Interactive Bounding Box Drawer and GeoJSON Export Tool

#

Sometimes you just need a fast way to collect coordinates without firing up some special tool or writing a script. This small browser-based tool lets you click points on a map, visualize a polygon, and export the coordinates or GeoJSON for later use in scripts, notebooks.

This small web tool provides an easy way to select a geographic bounding box directly on a map.
It’s designed for quick GIS workflows, API requests, or when you need to generate precise GeoJSON bounding boxes without opening a desktop GIS app.

The interface combines a Leaflet map on the left with a clean control panel on the right:

• You can drag and draw rectangles on the map to define a bounding box.
• The coordinates (minLon, minLat, maxLon, maxLat) are automatically displayed and can be copied as arrays or GeoJSON.
• It also calculates width, height, and area in square kilometers for quick reference.
• You can paste coordinates manually, and the map will re-center and redraw the bounding box.

This is useful when preparing regions for APIs that require bounding boxes (e.g., OpenStreetMap extracts, or satellite data portals). The layout is minimal, responsive, and works entirely client-side, nothing is uploaded or stored.