KML & GeoJSON to WKT Converter — Well-Known Text Geometry
Geometry ConverterKML / GeoJSON to WKT
The ultimate tool for developers to convert spatial data between KML, GeoJSON, and Well Known Text (WKT) formats.
Drag & drop files here, or click to select
Supports .kml, .geojson, .json, .txt (Up to 10MB)
Convert Options
Map Preview
Convert data to see visualization
Result Output
Understanding WKT and Geometry Conversion
What is WKT (Well-Known Text)?
Well-Known Text (WKT) is a standard text markup language designed for representing vector geometry objects on a map. Created by the Open Geospatial Consortium (OGC), it provides a clear, human-readable format for spatial data. Unlike GeoJSON or KML which are heavily nested structures, WKT is concise and direct, making it incredibly efficient for storing and transferring geometric data.
Why Do You Need WKT?
WKT is the backbone of spatial databases and geospatial integrations. You will almost certainly need to convert your KML or GeoJSON into WKT if you are:
- Importing Data to PostGIS: PostgreSQL with PostGIS relies heavily on WKT for inserting and updating geometric records.
- Writing Spatial SQL Queries: Functions like
ST_GeomFromText()use WKT to construct geometries within SQL statements. - Working with ORMs: Many backend ORMs (like Sequelize or TypeORM) map spatial columns to WKT strings.
- Lightweight Storage: WKT strips away properties and styling metadata, giving you just the raw mathematics of the shape, saving space.
Supported Geometry Types
Our converter engine supports all major OGC geometry structures, including:
POINT (78.123 10.456)LINESTRING (78 10, 79 11, 80 12)POLYGON ((78 10, 79 11, ...))Related Tools
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Frequently Asked Questions
Q:What is WKT format used for in GIS?
Well-Known Text (WKT) is a standard text representation of geometric shapes used in PostGIS, SQL Server Spatial, Oracle Spatial, and GIS APIs.
Q:What input formats does the WKT converter support?
Convert KML, KMZ, GeoJSON, Shapefile, and GPX geometries to WKT or EWKT format for database insertion.
Q:Can I convert WKT back to KML or GeoJSON?
Yes, the tool works bidirectionally — paste WKT geometry and convert it back to KML, GeoJSON, or Shapefile for visualization.
Q:Does it support EWKT with SRID?
Yes, you can specify a Spatial Reference Identifier (SRID) and output EWKT format for direct use in PostGIS spatial queries.
Q:Can I convert multiple geometries at once?
Yes, batch convert KML files with multiple features to a WKT GEOMETRYCOLLECTION or individual WKT strings for each feature.