WKT Viewer Online — Paste & Plot Geometry
Quick answer: Paste WKT geometry or open a .wkt file to visualize a point, line, or polygon on an interactive map. For a geographic preview, use longitude and latitude coordinates. You can also open .wkb geometry files.
Prepare your file and check the result
Before opening
Copy one geometry below, focus Open File in the viewer, and paste with Ctrl+V or Command+V. Alternatively, save the text as a .wkt file and open it. The examples use WGS 84 longitude, latitude coordinates.
Before sharing or converting
Expect geometry near London. Check X/Y order and the source CRS for your own data. A polygon ring must end with the same coordinate where it starts.
WKT examples to paste into the map
Point
POINT (-0.13 51.50)One point west of central London.
Line
LINESTRING (-0.13 51.50, -0.12 51.50, -0.12 51.51)A line with three vertices, travelling east and then north.
Polygon
POLYGON ((-0.13 51.50, -0.12 51.50, -0.12 51.51, -0.13 51.51, -0.13 51.50))A closed rectangle spanning −0.13 to −0.12 longitude and 51.50 to 51.51 latitude.
How to open WKT / WKB online
Visualize Well-Known Text (WKT) and Well-Known Binary (WKB) geometry files. Focus Open File and paste one WKT geometry, or open a .wkt or .wkb file. Use longitude, latitude coordinates for a geographic preview.
Privacy
Files are processed on your device in the browser. GeoDataViewer does not upload your datasets to a server for viewing.
Common issues
Paste one geometry at a time. Close polygon rings by repeating the first coordinate at the end. Projected eastings and northings need transformation to longitude and latitude before a geographic map preview.
Related tools
Measure distances, areas, elevation, and radius circles using the tools menu, then come back to inspect your WKT / WKB layer on the map.
Visualize WKT points, lines, and polygons
Copy one of the WKT workflow examples. Focus the Open File button in the viewer above and paste with Ctrl+V or Command+V, or save the text as a .wkt file and open it. The geometry is parsed locally and plotted on the map.
- ✓ POINT contains one coordinate pair; LINESTRING joins vertices; POLYGON contains a closed ring.
- ✓ For WGS 84 geographic coordinates, X is longitude and Y is latitude. A London point is POINT (-0.13 51.50), not POINT (51.50 -0.13).
- ✓ Geometry WKT describes a shape. CRS WKT such as PROJCS or GEOGCS describes a reference system and is not a drawable feature.
WKT does not automatically locate arbitrary projected coordinates on a world map. Check the source CRS and transform the coordinates first when needed. WKB is the binary representation of geometry; open it as a .wkb file, or paste its hex-encoded representation.
WKT / WKB Viewer FAQ
How do I paste WKT into the viewer?
Copy one geometry, focus the Open File button in the viewer, and press Ctrl+V or Command+V. Alternatively, save the geometry text as a .wkt file and open it. Start with POINT (-0.13 51.50) to see a point near London.
Why is my WKT geometry in the wrong place?
Check coordinate order and the source CRS. Geographic coordinates should use longitude followed by latitude. Eastings and northings from a projected CRS must be transformed to geographic coordinates before this map preview; a CRS identifier alone does not transform the numbers.
Can this viewer draw CRS WKT from a .prj file?
No. A CRS definition such as PROJCS or GEOGCS describes the coordinate system, not a point, line, or polygon. Use geometry WKT such as POINT, LINESTRING, or POLYGON to draw a feature.
Can I open WKB as well as WKT?
Yes. Open a .wkb geometry file, or paste hex-encoded WKB. WKT is readable geometry text; raw WKB is binary data and cannot be pasted as ordinary geometry text.