The WKT1 - WKB2 Converter is a web browser app for extracting geometric objects from WKT-WKB format and saving the extracted geometric objects to any of the supported vector formats.
Our online app is a quick and easy geometry converter to and from WKT-WKB formats. Our app supports vector and raster formats as well as SRS. The WKT format contains the information of the CRS (Coordinate Reference System), which can be geocentric, projected, vertical, and temporal SRS as well as geographic.

WKT is a human readable representation of the spatial objects like:
  • Point, Multipoint
  • LineString, MultiLineString
  • Polygon, Multipolygon, Triangle
  • CircularString
  • Curve, MultiCurve, CompoundCurve
  • CurvePolygon
  • Surface, MultiSurface, PolyhedralSurface
  • TIN (Triangulated Irregular Network)
  • GeometryCollection

Types of WKB
  • Point, Multipoint
  • LineString, MultiLineString, CircularString, GeodesicString
  • Polygon, Multipolygon, CurvePolygon
  • Surface, MultiSurface, Polyhedral Surface, CompoundSurface, BrepSolid
  • Triange, TIN (Triangulated irregular network)
  • Geometry Collection
  • Curve, CompoundCurve, MultiCurve, CurvePolygon, EllipticalCurve, NurbsCurve, Clothoid, SpiralCurve
  • Circle
  • AffinePlacement

3D (three-dimensional) geometry is denoted by the letter “Z” after the geometry type. Geometry with a linear referencing system is denoted by the letter “M” after the geometry type.

The geometric coordinates can be 2D (x, y), 3D (x, y, z), 4D (x, y, z, m) with the m-value part of the linear referencing system or 2D with an m value (x, y, m).

WKT reflects points in order of long (longitude)-lat (latitude) while most formats use the order of lat-long. The reason WKT has the reverse order is that lat represents north/south direction of a point and long represents east/west direction of a point. In this way, WKT refers to a point in its (x,y) coordinates, and it converts to long-lat.
GeoJSON follows the same order as WKT.
CSV format contains a WKT column with WKT geometry.

WKT and WKB variants:
  • EWKT (Extended Well-Known Text) and EWKB (Extended Well-Known Binary) is extended with SRID3 and 4 coordinate values (XYZM).
  • AGF Text – is an extension of the OGC standard, includes curved elements.
basic features

GIS WKT-WKB Converter

  • Converts WKT to ISO standard WKB
  • Supports both primitive types and multitypes
  • Quick conversion of Geodata formats
how to

WKT-WKB Converter

  • To switch from which format to convert to which, click the "Change Formats" button.
  • Paste in the left window the data you want to convert to another format.
  • Click on the "Convert" button.
  • The converted data will be displayed in the right window of the application.
Features of the Aspose.Gis WktWkbConverter free app


  1. Why can the conversion result from WKT to WKB be different from other resources on the web?

    This is because our application converts to WKB ISO format.
  2. Why can an error pop up when trying to convert?

    This may be due to the incorrect format of the input data. Check again the data that was inserted into the left window and what format is selected as the input.
  3. 📁 Are conversions to other formats supported?

    At the moment, the application supports conversions from WKT to WKB, as well as from WKB to WKT.
  4. 💻 Can I convert GIS files on Linux, Mac OS, or Android?

    Yes, you can use the free converter on any operating system that has a web browser. Our converter works online and does not require software installation.
  5. 🌐 Which browser should I use to convert GIS files?

    You can use any modern browser to convert an image, for example, Google Chrome, Firefox, Opera, Safari.
Version: 24.03.1
(Release notes)