Made for GIS & Geodata
GIS & geodata: convert formats, run spatial analysis, publish online
Move between Shapefile, GeoPackage, GeoParquet, FlatGeobuf, KML and PMTiles — plus buffer, overlay and simplify.
Geodata is parsed locally by default, sensitive layers stay on device
Broad format matrix including modern GeoParquet and PMTiles
Spatial analysis, simplification and CRS transforms without desktop GIS
Format conversion
Shapefile/GeoPackage/FlatGeobuf/GeoParquet to and from GeoJSON.
Shapefile to GeoJSONLocalConvert a Shapefile to GeoJSON — drop a .zip or loose same-name .shp/.dbf/.prj/.cpg files together (no zipping needed), with DBF encoding option; optional DXF export. Locally in your browser.GeoPackage to GeoJSONLocalConvert GeoPackage (.gpkg) to GeoJSON (read feature tables and WKB geometry), locally in your browser.FlatGeobuf to GeoJSONLocalConvert FlatGeobuf (.fgb) to GeoJSON, locally in your browser.GeoParquet to GeoJSONLocalConvert GeoParquet to GeoJSON (parse WKB geometry and attributes), locally in your browser.
Spatial analysis
Buffer, dissolve, overlay and attribute/spatial join, then export.
GeoJSON BufferLocalGenerate buffers around GeoJSON features (point/line/polygon) with selectable units, locally in your browser.GeoJSON DissolveLocalDissolve adjacent/overlapping GeoJSON polygons into one, removing internal boundaries, locally in your browser.GeoJSON OverlayLocalOverlay two GeoJSON layers in the browser: intersect/clip, erase, union and spatial join — locally, nothing uploaded.GeoJSON Attribute & Spatial JoinLocalJoin two GeoJSON layers in your browser: attribute join by matching keys, or spatial join merging polygon attributes into contained points.
Simplify and publish
Decimate, export TopoJSON/GeoParquet or generate PMTiles for web maps.
GeoJSON SimplifyLocalSimplify GeoJSON vertices with fast (Douglas-Peucker) or topology-preserving mode (no gaps on shared edges) to reduce file size, locally in your browser.GeoJSON to TopoJSONLocalConvert GeoJSON to TopoJSON (shared topology, smaller files), locally in your browser.GeoJSON to PMTilesLocalTile GeoJSON into vector tiles packed as a single PMTiles file locally in your browser (geojson-vt + in-house PMTiles writer) — nothing is uploaded. Ideal for R2/CDN distribution.GeoJSON to GeoParquetLocalConvert GeoJSON to GeoParquet (columnar, great for large datasets), locally in your browser.
Maps and tables
CSV/GPX/KML to GeoJSON, or back out to spreadsheets.
CSV to GeoJSONLocalConvert CSV with latitude/longitude columns to GeoJSON points, locally in your browser.GeoJSON to CSVLocalExport GeoJSON feature attributes to CSV with centroid lon/lat, locally in your browser.GPX to GeoJSONLocalConvert GPX tracks, routes and waypoints to GeoJSON (LineString/Point), locally in your browser.KML to GeoJSONLocalConvert KML to GeoJSON — parse Placemark point/line/polygon coordinates, locally in your browser.
PMTiles and national-scale reprojection
Pro is $12/mo: 50 cloud tasks/day and 500 MB per file; tile generation and CRS reprojection run server-side for bigger data.