Free DWG Viewer Online — Open DWG Files
Quick answer: Open an AutoCAD DWG drawing online to preview its CAD geometry in a browser-based GIS viewer before converting or sharing it.
Prepare your file and check the result
Before opening
Keep a copy of the original drawing and note its DWG version, units and source CRS. Compatibility depends on the drawing and entities it contains.
Before sharing or converting
Check a known location and the geometry you need. If the DWG cannot be read, export a DXF copy from the authoring application and try that file.
How to open AutoCAD DWG online
View AutoCAD DWG drawings online. Open your .dwg file for a geometry preview. If the file version or entities cannot be read, try a DXF export from the source CAD application.
Privacy
Files are processed on your device in the browser. GeoDataViewer does not upload your datasets to a server for viewing.
Common issues
DWG compatibility depends on the file version and entities. If loading fails, export a DXF copy from the authoring application. A drawing with a local origin still needs georeferencing before it can align with a basemap.
Related tools
Measure distances, areas, elevation, and radius circles using the tools menu, then come back to inspect your AutoCAD DWG layer on the map.
Preview DWG geometry without installing AutoCAD
Open your .dwg drawing in the viewer above to inspect the geometry that can be read into a map layer. Processing runs on your device. Keep a copy of the original CAD file and compare important entities against the source drawing.
- ✓ Identify the drawing units and source coordinate system. Local engineering coordinates need georeferencing before they can align with a geographic basemap.
- ✓ Inspect imported linework, polygons, and attributes rather than assuming every CAD entity has been preserved.
- ✓ Text, blocks, curves, dimensions, external references, and styling may differ in the GIS representation.
Use a CAD application for drafting, dimension editing, layouts, plotting, or faithful presentation of complex drawings. This tool provides a geographic geometry preview; it is not a full CAD editor.
AutoCAD DWG Viewer FAQ
Can I open a DWG file online without AutoCAD?
Yes. Choose Open File or drag the .dwg file into the viewer. It attempts to read the drawing geometry locally in your browser. Compatibility depends on the file and its entities; compare the preview with the original drawing.
Why does my DWG drawing not align with the map?
CAD coordinates may use a local origin, drawing units, or a projected CRS. Check known control points and transform or georeference the drawing as appropriate. Merely assigning a CRS does not move an arbitrary local drawing into its real location.
Is this a DWG editor or a complete CAD viewer?
It is a geometry viewer for map inspection. It does not provide CAD drafting, dimension editing, print layouts, or guaranteed reproduction of all drawing objects and styles.
What should I try if my DWG file will not open?
Check that the file is a valid DWG and note its version. Export a DXF copy from the authoring CAD application and try the linked DXF viewer. Keep the original; conversion may change unsupported entities.