GeoJSON utilities that will make your life easier.

• geojson-coords: Extract coordinates from GeoJSON
• geojson-extent: compute the bounding box of geojson features
• geojson-flatten: flatten multi geometries into normal geometries
• geojson-multiply: merge normal geojson features into one multi geometry type feature
• geojson-js-utils: JavaScript helper functions for manipulating GeoJSON
• geojson-merge: Merge multiple GeoJSON files into one FeatureCollection.
• geojson-normalize: normalize any geojson object into a geojson featurecollection
• geojson-pick: remove all but specified properties from features in a geojson featurecollection
• geojson-random: generate random geojson points, lines, and polygons
• geojson-rewind: enforce ring winding order
• geojson-summary: get a plain-english summary of what's in a geojson file
• point-grouper: group geojson points into containing polygons
• geojson-join: join geojson against json, dbf, and csv files
• simplify-geojson: apply the ramer-douglas-peucker line simplification to geojson features or feature collections in JS or on the CLI
• turf: collection of functions for spatial operations and analysis
• winnow: run sql queries against geojson with javascript

• geojson.io: web-based editor, supports many filetype imports & exports, operations, sharing via GitHub
• umap: web-based editor, supports sharing on-site
• simple geojson editor: geojson editor on a google map, by google
• mapstarter: helps generate svg, images, and code from GeoJSON
• gjv: electron app enables viewing GeoJSON locally and hack on it with turf; works offline

• geojsonhint: find errors in your geojson files

• geojsonio-cli: send geojson features to geojson.io from your command line
• geojsonio-extension: chrome extension for editing github files in geojson.io
• geojsonlint: REST interface for GeoJSON validation
• mapshaper: Simple interface for simplification and conversion of GeoJSON and TopoJSON
• koop: Server with plugins that recast Esri, GitHub, Socrata and other services as GeoJSON endpoints

• csv2geojson: convert CSV to geojson
• geojson-mapnikify: Transform GeoJSON objects into Mapnik XML stylesheets with embedded GeoJSON data and simplestyle-spec-derived styles.
• geojson-vt: Slice GeoJSON into vector tiles on the fly in the browser
• geojson2dsv: convert geojson to csv and tsv
• geojson2rtree: generate a static rtree (using terraformer) from a set of geojson features
• ogr2ogr: convert anything to anything
  • fiona: nice python interface on top of ogr
• minjur: converts OpenStreetMap data to GeoJSON faster than anything else
• shp2json: convert shapefile zip archives to streaming GeoJSON
• togeojson: convert gpx & kml to geojson
• tokml: convert geojson to KML
• topojson: convert GeoJSON to & from TopoJSON, join data from CSV
• vt-geojson: Extract GeoJSON from Mapbox vector tiles
• wellknown: convert wkt to geojson
• osmtogeojson: convert OpenStreetMap data to GeoJSON
• esri2open converts proprietary Esri formats to GeoJSON
• gtfs2geojson: convert GTFS transit data to GeoJSON
• geoxform: convert any size stream of geojson into a streaming csv, shapefile or kml, etc.

• natural earth: country, province, and geographical data
• geojson.xyz: natural earth data in web-friendly sizes with hotlinking
• world-atlas: customizable simplified versions of natural earth data
• openflights-geojson: openflights airports & airplane routes
• us-atlas: geojson & topojson for United States features
• metro-extracts: regional OpenStreetMap data as GeoJSON
• whereonearth-airport: outlines of every airport
• whereonearth-building: building outlines
• whereonearth repos: other features output from GeoPlanet by Aaron Straup Cope
• tgn-geojson: The Getty Thesaurus of Geographic Names (TGN) As GeoJSON.
• strava-to-geojsonio: export runs & rides from Strava to GeoJSON
• strava-geojson: export all strava data to geojson, in node & on the web

• python-geojson: serialize geojson to/from python datatypes
• rgeo-geojson: serialize geojson to/from ruby RGeo datatypes
• rust-geojson: serialize geojson to/from rust datatypes

• GeoJSON.org: the specification, defining all the rules for GeoJSON structures
• More than you ever wanted to know about GeoJSON: a review of the concepts behind the specification in a more narrative format.

To the extent possible under law, Tom MacWright has waived all copyright and related or neighboring rights to this work.