Convert geodata. in the browser — or one API call.

11 geospatial formats — GeoJSON, Shapefile, KML, GeoParquet & more. Free in the browser. Pay-as-you-go API with built-in validation: no GDAL install, no servers, credits that never expire.

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Why Lat·Lng

• 11 — formats — read & write
• 8,112 — EPSG codes supported
• RFC 7946 — validated output
• 100% — processed in browser

• Auto CRS detection. Coordinate reference systems are detected and handled automatically — no manual EPSG guessing.
• Client-side by default. Conversions run in your browser; your files never leave your device unless you choose to save them.
• RFC 7946 validated. GeoJSON output is validated against RFC 7946 so it loads cleanly in every mapping library.
• Works at scale. Batch conversion and large-file support for production GIS workflows.

Developers: one API call

POST a file to the REST API and get the converted result back — no GDAL install, no servers. 25 free API credits every month; credit packs from €9 that never expire. Add integrity validation with a single query parameter.

• Shapefile to GeoJSON API
• KML to GeoJSON API
• CSV to GeoJSON API
• API documentation & quickstart
• API credits pricing

Popular converters

• Convert KML to GeoJSON
• Convert GeoJSON to KML
• Convert CSV to GeoJSON
• Convert GeoJSON to CSV
• Convert Shapefile to GeoJSON
• Convert GeoJSON to Shapefile
• Convert KML to Shapefile
• Convert Shapefile to KML
• Convert KML to CSV
• Convert CSV to KML
• Convert GeoJSON to GeoParquet
• Convert Shapefile to GeoParquet

Tools & reference

• Geodata integrity check
• Coordinate converter
• GeoJSON / file validator
• Lat/lng swap checker
• CRS detector
• Coordinate reference systems (EPSG) reference
• Troubleshooting guides
• Compare coordinate systems
• Supported format reference
• API documentation
• Batch conversion
• Pricing

Frequently asked questions

What geospatial formats can I convert with Lat·Lng?

Lat·Lng supports 11 formats with full read and write: GeoJSON, KML, CSV, Shapefile (SHP), GPX, TopoJSON, WKT, WKB, GML, GeoParquet, and FlatGeobuf.

Is there a file size limit for conversions?

Free converts files up to 15 MB and Pro up to 1 GB per file.

Do you store my geospatial data?

Conversions run in your browser by default — files never leave your device unless you sign in to save them.