CAD Viewer
CAD Viewer is a free, open-source browser-based WebGL runtime for viewing and editing DWG and DXF drawings.
What CAD Viewer is
CAD Viewer is a free, open-source browser-based WebGL runtime for viewing and editing DWG and DXF drawings. It displays model space, layouts, layers, blocks and external references. Write mode lets users create, edit and delete drawing entities with AutoCAD-style drawing and modification commands. Review tools place markups—including arrows, text, clouds, rectangles, circles and callouts—over a read-only drawing background. Measurements cover distance, area, angle and arc length, and can be exported to a JSON sidecar file. The product can create a self-contained HTML viewer for offline use, with pan, zoom, layers and distance measurement; that export can be protected by password and expiry. The maker says drawings are parsed and rendered on the client, without being uploaded, cached or mirrored to a server. Embedding is available through iframe or npm, and a Google Drive integration opens drawings from Drive. The responsive interface adapts to phones, tablets and desktops, with touch operations documented for mobile. Read-only mode disables markup, drawing and modification commands.
Good
- Free and open source
- Supports DWG and DXF
- Exports a self-contained offline HTML viewer
- Drawings are processed on the client
Watch out
- Read-only mode disables markup and editing commands
Who it suits
It suits people who need browser-based DWG/DXF viewing, review or editing, as well as developers building web editing workflows. Mobile users can use its responsive interface and documented touch operations.
Verdict
CAD Viewer offers viewing, review and editing capabilities in a browser, with offline HTML export and client-side drawing processing. Note that read-only mode disables markup and modification tools.
Plans and prices
From CAD Viewer's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Free browser CAD for viewing, review, and editing · open-source toolkit |
The facts
Each one read from CAD Viewer's own pages, with the date it was checked.
The company
- Company details
- The opened maker pages identify the product as MLightCAD but do not state its headquarters or founding year.checked 4 Oct 2026
What it does
- Drawing support
- It displays model space, layouts, layers, blocks, and external references.checked 4 Oct 2026
- Editing
- Write mode supports creating, editing, and deleting drawing entities, with AutoCAD-style drawing and modification commands.checked 4 Oct 2026
- Exports
- The examples include HTML and PDF export from the full viewer, and lazy-loaded HTML, PDF, and SVG export plugins in the simple viewer.checked 4 Oct 2026
- Integrations
- The maker describes embedding through iframe or npm and lists a Google Drive integration for opening drawings from Drive.checked 4 Oct 2026
- Intended users
- The maker presents CAD Viewer as a free browser CAD product and open-source toolkit for people building web editing workflows.checked 4 Oct 2026
- Languages
- The documentation lists English, Chinese, Arabic, Czech, Turkish, Japanese, and Korean interfaces.checked 4 Oct 2026
- Measurements
- Measurement tools include distance, area, angle, and arc-length measurements, which can be exported as a JSON sidecar file.checked 4 Oct 2026
- Notable limit
- Read-only mode disables markup, drawing, and modification commands.checked 4 Oct 2026
- Offline export
- It can export a self-contained HTML viewer that opens offline and supports pan, zoom, layers, and distance measurement; the export can be password- and expiry-protected.checked 4 Oct 2026
- Privacy
- The product says drawing parsing and rendering happen on the client and drawings are not uploaded, cached, or mirrored to a server.checked 4 Oct 2026
- Purpose
- CAD Viewer is a browser-based WebGL runtime for viewing and editing DWG/DXF drawings.checked 4 Oct 2026
- Review
- Review tools add markups such as arrows, text, clouds, rectangles, circles, and callouts over a read-only drawing background.checked 4 Oct 2026
Where it runs
- Supported devices
- The responsive interface adapts to phones, tablets, and desktops and documents touch operations for mobile.checked 4 Oct 2026
Alternatives to CAD Viewer
- 1
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