WKT to GeoJSON Converter Online
Paste any Well-Known-Text geometry and instantly transform it into clean, validated GeoJSON — with a live map preview, real-time syntax checking, and one-click download.
Live Map Preview
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Powerful Features for WKT to GeoJSON Conversion
Built for GIS professionals, developers, and data teams who need accurate, fast, and secure geometry conversion.
Instant Real-Time Validation
Syntax is checked character-by-character as you type. Invalid tokens, mismatched parentheses, and unknown geometry types are flagged instantly with clear error messages.
Live Interactive Map Preview
Every converted geometry is rendered on an OpenStreetMap-backed Leaflet map so you can visually verify coordinates, rings, and orientations before exporting.
100% Client-Side & Private
Your WKT never leaves the browser. No uploads, no server logs, no telemetry on your geometry — perfect for sensitive or proprietary spatial datasets.
All Standard Geometry Types
Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, and GeometryCollection — plus XYZ, XYM, and XYZM dimensions, plus PostGIS SRID prefix.
Flexible Output & Download
Choose Geometry, Feature, or FeatureCollection output. Round coordinates to 2–8 decimals. Pretty-print or minify. Copy to clipboard or download as .geojson.
Bounding Box & Stats
After conversion, instantly see geometry type, coordinate count, bounding box, and SRID — useful for QA workflows and quick data profiling.
How WKT to GeoJSON Conversion Works
Three simple steps from raw WKT text to a downloadable, map-verified GeoJSON file.
Paste your WKT geometry
Copy a WKT string from PostGIS, a CSV file, or any spatial database output and paste it into the input box. Use an example chip to try a sample geometry.
Click Convert to GeoJSON
The built-in WKT parser tokenises your input, validates the structure, and produces a clean GeoJSON object in your chosen format with optional precision rounding.
Verify, copy, or download
Inspect the converted geometry on the live map preview, review the bounding box and coordinate count, then copy the JSON or download it as a .geojson file.
Security Recommendations for WKT & GeoJSON
Best practices when working with Well-Known-Text and GeoJSON in production pipelines.
Validate untrusted WKT before parsing
Always run WKT through a strict parser like this one before using it in queries or pipelines. Malformed input can crash naive regex-based converters.
Use parameterised queries in databases
Never concatenate WKT into SQL strings. Use ST_GeomFromText($1, srid) with bound parameters to prevent injection.
Check coordinate bounds
Validate that longitude is within ±180 and latitude within ±90 before publishing GeoJSON. Out-of-bounds coordinates break most mapping libraries silently.
Mind the projection (SRID)
WKT may carry an SRID prefix. GeoJSON assumes WGS84 (EPSG:4326). If your source is in another projection, reproject before converting.
Sanitize GeoJSON properties
If you serialize Feature properties from user input, escape HTML and limit field sizes to prevent XSS when rendering GeoJSON in browsers.
Prefer client-side conversion
Converting WKT in the browser (as this tool does) avoids sending raw geometry over the network, reducing exposure of sensitive location data.
Convert WKT to GeoJSON
Converting WKT to GeoJSON is an everyday need for GIS analysts, web map developers, and database engineers who handle spatial information. Well-Known-Text, or WKT, is a compact text representation of vector geometries defined by the Open Geospatial Consortium. It is the default output format when you query geometry columns in spatial databases like PostGIS, MySQL Spatial, and SQL Server. GeoJSON, on the other hand, is a JSON-based open standard that has become the de-facto format for web mapping because it integrates natively with JavaScript libraries such as Leaflet, Mapbox GL, OpenLayers, and Google Maps.
While WKT is excellent for compact storage and human inspection, modern applications overwhelmingly prefer GeoJSON. APIs, REST endpoints, frontend frameworks, and visualization libraries expect GeoJSON objects with explicit type definitions and coordinate arrays. Manually translating between the two formats is error-prone, especially when dealing with nested geometries like MultiPolygon or GeometryCollection. A reliable WKT converter removes that friction entirely.
Our WKT to GeoJSON converter supports every standard geometry type including Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, and GeometryCollection. It also handles three-dimensional coordinates (XYZ), measured values (XYM), four-dimensional geometries (XYZM), and the optional SRID prefix used by PostGIS. The parser runs entirely in your browser, so your spatial data is never uploaded to any server — an important consideration when working with proprietary coordinates, customer locations, or sensitive datasets.
To use the tool, simply paste your WKT string into the input box. Real-time syntax validation flags issues as you type. Click convert, and the formatted GeoJSON appears in the output panel with an interactive map preview that renders the geometry over OpenStreetMap tiles. From there you can copy the result to your clipboard or download it as a .geojson file ready for use in any mapping pipeline. No installations, no accounts, and no daily limits — just a fast, secure, and accurate WKT to GeoJSON conversion whenever you need it.
Frequently Asked Questions
Common questions about converting WKT to GeoJSON, format differences, and supported geometry types.
SRID=4326; prefix used by PostGIS. Empty geometries (e.g. POINT EMPTY) are also recognised.
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