View, validate, and convert GeoJSON in seconds.
A small collection of tools for working with GeoJSON: a viewer, a validator, a formatter, a simplifier, and round-trip converters for CSV, KML, and GPX. Everything runs in your browser — nothing uploaded.
Moving data between formats
To get your spatial data into a modern stack, the
KML → GeoJSON converter,
GPX → GeoJSON converter, and
CSV → GeoJSON converter turn legacy XML, GPS, and spreadsheet files into clean FeatureCollection objects you can immediately use in your apps. Going the other way, the
GeoJSON → KML converter generates KML 2.2 files perfect for Google Earth, the
GeoJSON → GPX converter emits GPX 1.1 for Garmin / Strava / Komoot devices, and the
GeoJSON → CSV tool flattens nested properties into a simple table with lng, lat, and WKT columns for easy spreadsheet analysis.
Inspecting and reshaping GeoJSON
If you just want to see your data, the GeoJSON viewer renders your features on a map instantly without a single server round-trip. When your files are too heavy for mobile web maps, the Simplify GeoJSON tool uses Douglas-Peucker logic to strip out redundant vertices while maintaining the integrity of your shapes. To clean up messy files, the GeoJSON formatter can pretty-print your JSON with a chosen indent or minify it to a single line to save on transfer costs.
Checking for errors
Before shipping a file to a production API, run it through the GeoJSON validator to catch syntax errors or RFC 7946 spec violations. It provides line-accurate reports on everything from geometry types and coordinate ranges to polygon ring closure, saving you from hours of debugging silently failing map renders.
What they have in common
Everything runs in your browser. The coordinates and private data you drop or paste never leave your machine — there is no backend server processing your files. I can’t see what you’re working on, which means no size limits, no accounts, and no risk of data leaks.
Sensible defaults, no surprises. These tools follow the GeoJSON spec strictly but stay out of your way. Your properties are preserved exactly as they are, and I don't touch your coordinate precision unless you specifically ask me to.
Free to use, with no warranty. This is a collection of tools I built because I was tired of uploading my private data to random sites to do simple tasks. If you find a bug or have a suggestion, feel free to drop me a line at [email protected].
— S., [email protected]