Tools
View, validate, simplify, buffer, clip, union, merge and measure.
- GeoJSON Viewer, View and visualize GeoJSON files on an interactive map. Paste or upload your GeoJSON data to see it rendered instantly.
- GeoJSON Validator, Validate your GeoJSON data against the RFC 7946 specification. Find and fix errors in your GeoJSON files.
- GeoJSON Simplifier, Simplify complex GeoJSON geometries to reduce file size while preserving shape accuracy.
- GeoJSON Optimizer, Reduce coordinate precision. Simplify geometry. Drop unused properties. Minify. Every step reports what it saved as it runs.
- GeoJSON Bounding Box Calculator, Calculate the bounding box envelope of any GeoJSON geometry. Get min/max coordinates instantly.
- GeoJSON Area Calculator, Calculate the area of GeoJSON polygons in square meters and square kilometers.
- GeoJSON Length Calculator, Calculate the total length of GeoJSON LineStrings in meters and kilometers.
- GeoJSON Centroid Calculator, Find the geographic center point of any GeoJSON geometry. Calculate centroids for polygons and feature collections.
- GeoJSON Merge Tool, Merge multiple GeoJSON files into a single FeatureCollection.
- GeoJSON Buffer Tool, Create buffer zones around GeoJSON geometries at a specified distance.
- GeoJSON Clip Tool, Clip GeoJSON features to a bounding box or polygon boundary.
- GeoJSON Union Tool, Compute the union of multiple GeoJSON polygons into a single geometry.
Converters
GeoJSON to and from KML, WKT, GPX and plain coordinates.
- GeoJSON to KML Converter, Convert GeoJSON files to KML format for use in Google Earth and other mapping applications.
- KML to GeoJSON Converter, Convert KML files from Google Earth to GeoJSON format for web mapping and GIS applications.
- GeoJSON to WKT Converter, Convert GeoJSON geometries to Well-Known Text format for use in databases like PostGIS.
- WKT to GeoJSON Converter, Convert Well-Known Text geometries to GeoJSON format for web mapping and visualization.
- GPX to GeoJSON Converter, Convert GPX track files to GeoJSON format. Transform GPS data for web mapping.
- Lat/Long to GeoJSON Converter, Convert latitude and longitude coordinates to GeoJSON Point features.
- GeoJSON to Lat/Long Extractor, Extract latitude and longitude coordinates from GeoJSON features into a table or CSV.
Guides
The specification, debugging, file size, and language guides.
- What is GeoJSON?, Learn about GeoJSON - the open standard format for encoding geographic data structures using JSON.
- GeoJSON Specification (RFC 7946), A developer-friendly guide to the GeoJSON specification RFC 7946 with examples and explanations.
- GeoJSON Examples, Browse common GeoJSON examples for Point LineString Polygon and FeatureCollection types.
- GeoJSON Best Practices for Developers, Best practices for working with GeoJSON data in web mapping and GIS applications.
- Coordinate Reference Systems (CRS), Understand coordinate reference systems and how they relate to GeoJSON and web mapping.
- GeoJSON vs TopoJSON Comparison, Compare GeoJSON and TopoJSON formats. Learn when topology-preserving formats save space.
- Web Mapping Developer Guide, A comprehensive guide to building interactive web maps with GeoJSON Leaflet and modern tools.
- Using GeoJSON with PostGIS, Learn how to import export and query GeoJSON data in PostGIS spatial databases.
- GeoJSON Frequently Asked Questions, Answers to the most common GeoJSON questions about coordinate order file size limits and browser support.
- GeoJSON Debugging Guide, Fix common GeoJSON problems: points in the ocean reversed polygons invalid geometries and coordinate order issues.
- GeoJSON File Size Optimization, One public-domain dataset taken from 55 MB down to 4 MB. What each optimisation is actually worth once the file is compressed.
- Spatial Operations Explained, Learn buffer clip union intersection and difference operations with real GeoJSON examples you can paste into tools.
- GeoJSON vs Shapefile vs GeoPackage, Compare GeoJSON Shapefile GeoPackage and other geospatial formats. When to use each and migration strategies.
- Working with GeoJSON in Python, Use GeoJSON in Python with json Shapely GeoPandas and Fiona. Read write transform and serve spatial data.
- Working with GeoJSON in JavaScript, Parse transform and render GeoJSON in JavaScript with Turf.js Leaflet Mapbox GL and TypeScript types.
- Build a Store Locator with GeoJSON, Step-by-step tutorial: geocode addresses create GeoJSON features and build a proximity search map with Leaflet.
- GeoJSON JSON Schema, RFC 7946 as a schema, and the five rules no schema can check
- GeoJSON with language models, how much bad geometry your library catches, and what geometry costs in tokens
Datasets
Every measurement on this site, and the benchmarks behind it.
- Simplification compared, eight backends over one dataset, and how many shared borders each pulls apart
- Format conversion compared, eleven formats over one dataset, and what each one drops on the way through
About
What the site is, who to contact, and the policies that govern it.
- Contact, how to reach us and what to include in a bug report
- Corrections, published claims that turned out to be wrong
- Sitemap, every page on the site, grouped by section
- Privacy Policy, what happens to your data here
- Terms of Service, the terms that govern use of the site