GeoJSON to NDJSON

Newline-delimited GeoJSON (NDJSON, also called GeoJSONL or GeoJSON Text Sequences) writes one GeoJSON Feature per line instead of wrapping them all in one FeatureCollection. Tools like tippecanoe and ogr2ogr prefer it because a huge dataset can be streamed line by line without loading the whole file into memory.

This tool reads your GeoJSON FeatureCollection and writes each feature as one compact JSON object on its own line. The geometry and properties of every feature are kept exactly; only the surrounding FeatureCollection wrapper is removed. The partner tool NDJSON to GeoJSON puts it back together.

Everything runs entirely locally in the browser - your possibly sensitive location data never leaves your device. Honestly framed: the output is one feature per line, not a single JSON document, so it will not validate as one GeoJSON object on its own - that is exactly what NDJSON is for. An invalid or empty GeoJSON is rejected with a clear message.

The practical charm of the line format: every line is valid JSON on its own. The simplest tools therefore just work - a line counter gives you the feature count, a text search filters features out, and new features can simply be appended to the end of the file without ever parsing the whole thing.

Specifications

In 3 steps

1. Drop your GeoJSON file.
2. The conversion runs automatically.
3. Download the NDJSON (e.g. for tippecanoe).

Limitations: Converts a GeoJSON FeatureCollection to newline-delimited GeoJSON (NDJSON / GeoJSONL): one Feature as compact JSON per line. Used by tippecanoe and ogr2ogr for streaming large datasets. Round-trips with NDJSON to GeoJSON. An invalid or empty GeoJSON is rejected with a clear error.

FAQ

Related tools

NDJSON to GeoJSON · GeoJSON to CSV · GeoJSON to WKT · GPX to KML · GeoJSON to TopoJSON · TopoJSON to GeoJSON