GeoJSON to GeoParquet
Convert GeoJSON to columnar GeoParquet (SNAPPY/GZIP/uncompressed) in your browser — nothing uploaded, free with no sign-up.
Processing and data safety
Section titled “Processing and data safety”This tool runs entirely in your browser — your files are never uploaded to a server.
Input and output
Section titled “Input and output”- Formats: GeoJSON, GeoParquet
- Flow: GeoJSON → GeoParquet
How to use
Section titled “How to use”- Drop a .geojson (or .json) file — conversion starts automatically (there is no convert button); the file stays in the page.
- The <original-name>.parquet file downloads automatically when conversion finishes; the result area reports the codec, feature count and size.
- Switch the compression selector (SNAPPY / GZIP / Uncompressed) to re-convert the loaded file without dropping it again.
Key details and limits
Section titled “Key details and limits”- Property columns are typed: mixed-type columns and integers beyond the 32-bit range (e.g. OSM node ids) are rejected with a named, actionable error; nested object/array values are stored as JSON text.
- Output has a single WKB geometry column named “geometry” — GeoJSON carries one geometry per feature, so no multi-geometry-column output is created; binary properties are not applicable to GeoJSON input (complex values go to JSON text).
- Geometry is WKB with the standard geo metadata; compression is SNAPPY (default), GZIP or none — ZSTD is not offered (no in-browser codec).
Common use cases
Section titled “Common use cases”- Drop in a .geojson → download a .parquet (SNAPPY/GZIP/uncompressed selectable, result area reports codec + feature count + size)