How to open a .3D file online
From file to map in seconds.
Open your .3D file
Drag it onto the box or click to choose it from your device. It opens on your computer.
See it on the map
Points, lines and areas from your .3D file appear on an interactive map. Click any feature to read its details.
Read the stats
Check distance, elevation gain and loss, the bounding box and a height profile linked to the map.
What is a .3D file?
The common language of GPS devices.
A .3d file is most commonly a Survex 3D Cave Survey file - a binary file holding 3D coordinates, passages, and measurements from underground cave surveys. Open it with Aven, the viewer bundled with Survex (free, Windows/macOS/Linux). The .3d extension is also used by unrelated programs (VersaCAD, Cadwork), so the file may not be a cave survey file at all.
Programs that open .3D files
| Full name | Survex 3D Cave Survey File |
|---|---|
| Developer | The Survex Project (Olly Betts, primary maintainer) |
| First released | 1991 (Survex project first release) |
| Category | Maps & GIS |
| MIME type | application/octet-stream |
Related viewers
More free tools for your files.
Is my .3D file uploaded anywhere?
No. Your .3D file is read by your browser and never sent to us. Only the background map tiles are loaded from OpenStreetMap, which sees which map area you're looking at, not your data.
How is the elevation gain calculated?
We add up every climb between track points, ignoring tiny wiggles of less than 3 metres that come from GPS noise. That's close to what Strava and Garmin report; barometric devices may differ slightly.
How do I open a Shapefile?
A Shapefile is several files. Drop the whole .zip, or select the .shp, .dbf and .prj files together. With only the .shp you'll see the shapes but no attributes.
Can I convert GPX to KML or GeoJSON?
Use Export GeoJSON to save everything you see. GPX ↔ KML conversion is part of our upcoming converter.
My CSV has coordinates. Will it work?
Yes, if it has columns named like lat/latitude/y and lon/lng/longitude/x. Every row becomes a point with the other columns as properties.
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