Free Online GeoJSON Validator and Linter
Validate your GeoJSON files instantly with our free GeoJSON Validator. Check syntax, detect geometry errors, and inspect coordinates in your browser.
About GeoJSON Validator
The GeoJSON Validator verifies spatial data files against the official RFC 7946 GeoJSON specification. Designed for GIS specialists, web developers, and cartographers, this tool quickly pinpoints structural syntax errors, invalid geometry types, and unclosed coordinate rings before you integrate data into mapping platforms.
Everything runs directly inside your web browser, ensuring that proprietary coordinates and sensitive location datasets remain private. With instant error reporting and in-browser editing, you can diagnose issues and clean up spatial data without installing external software.
Key features
- Validates compliance with the official RFC 7946 specification.
- Detects syntax errors and malformed JSON structures instantly.
- Highlights invalid coordinates and unclosed geometry rings.
- Supports Feature, FeatureCollection, and raw geometry objects.
- Processes files client-side to ensure complete data privacy.
- Formats and beautifies valid GeoJSON data with one click.
How to use GeoJSON Validator
- Paste your GeoJSON code into the editor or load a file.
- Click the validate button to initiate the syntax and schema check.
- Review any flagged syntax errors, coordinate issues, or geometry warnings.
- Correct the identified issues directly inside the browser editor.
- Copy or save the clean, validated GeoJSON output.
Who is it for?
- GIS analysts verifying spatial datasets before importing them into mapping software.
- Web developers debugging coordinate order and syntax for Leaflet or Mapbox layers.
- Data engineers validating spatial exports from PostgreSQL and PostGIS databases.
- Cartographers confirming that polygon rings follow standard right-hand winding rules.
Frequently asked questions
What does a GeoJSON validator check?
It verifies that your spatial data conforms to the RFC 7946 standard. This includes checking valid JSON syntax, correct coordinate formatting, closed polygon rings, and valid geometry structures.
Is my spatial data uploaded to an external server?
No. All validation and processing take place directly within your web browser. Your coordinates and geographic boundaries never leave your machine.
What coordinate order is expected in GeoJSON?
The GeoJSON specification requires coordinates to be ordered as [longitude, latitude], with optional elevation as the third value. Swapping latitude and longitude is one of the most common causes of validation failure.
Which GeoJSON types can this tool validate?
The tool supports all standard types, including Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon, GeometryCollection, Feature, and FeatureCollection.
Is the GeoJSON Validator free to use?
Yes, this tool is completely free to use with no account registration or software installation required.