Free tool
Online surveying file viewer
Drop a KML, KMZ, GPX, DXF, GeoJSON or Shapefile to see it on a live map with each feature’s attributes and geodesic length/area — all in your browser, nothing uploaded.
Surveying file viewer
Drop a file here or click to choose
GeoJSON · KML · KMZ · GPX · DXF · Shapefile (ZIP)
All processing happens in your browser — nothing is uploaded to any server.
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FAQ
- Which formats can I view?
- The viewer renders six geometry formats: GeoJSON, KML, KMZ, GPX, DXF and Shapefile (as a ZIP bundling .shp/.dbf/.prj). CSV and Excel files need manual column mapping, so use the file converter for those instead.
- Are my files uploaded?
- No. All reading, reprojection and measurement happen entirely in your browser; neither the file nor its coordinates are sent to any server. We only record an anonymous work-area tally after you consent to tracking.
- How is the coordinate system detected?
- For Shapefiles the CRS is read from the bundled .prj file (WKT). KML, KMZ, GPX and GeoJSON are WGS 84 by specification (GPS longitude/latitude). Every feature is then reprojected to WGS 84 for the map.
- What happens when I click a feature?
- A panel shows the feature’s name and an attribute table (fields and values), plus a rigorous geodesic measurement: total length for lines, and area plus perimeter for polygons — computed on the WGS 84 ellipsoid with Karney’s algorithm.
- What are the file limits?
- Up to 50 MB per file, 50,000 features, and 2 million vertices, since everything runs on the browser’s main thread. If your file exceeds these, split it or simplify the geometry and retry.
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