Freedom251 › CAD Viewer Software
CAD Viewer
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. In write mode, users can create, edit, and delete drawing entities with AutoCAD-style drawing and modification commands. Review tools place annotations such as arrows, text, clouds, shapes, and callouts over a read-only drawing background. Measurement tools cover distance, area, angle, and arc length, with results exportable as a JSON sidecar file. The viewer can produce a self-contained HTML file for offline use with pan, zoom, layer controls, and distance measurement; that export can have password and expiry protection. MLightCAD says drawing parsing and rendering happen on the client and drawings are not uploaded, cached, or mirrored to a server. Embedding is available through iframe or npm, and a Google Drive integration can open drawings from Drive. The interface adapts to phones, tablets, and desktops. Read-only mode disables markup, drawing, and modification commands.
Who it suits
It suits people who need browser-based DWG or DXF viewing, review, measurement, or editing, and developers building web editing workflows. Its free open-source toolkit and embedding options may also suit teams integrating a viewer into a web product.
What it does well
- Free and open source
- Supports DWG and DXF
- Includes drawing, review, and measurement tools
- Can export a self-contained offline HTML viewer
- Drawings are said not to be uploaded or cached
What to know first
- Read-only mode disables markup and editing commands
- Offline HTML export offers a narrower toolset than the full viewer
Limits
The free plan is listed as free. Read-only mode disables markup, drawing, and modification commands; no other free-plan quota is listed.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | Free browser CAD for viewing, review, and editing · open-source toolkit | Free |
As mlightcad.com lists them, read 4 Oct 2026. The maker's own page has the final word.
Getting started
- Open the CAD Viewer website in a browser.
- Use the web interface on a phone, tablet, or desktop.
- Open drawings from Google Drive through the listed integration, or embed the viewer through iframe or npm.
- Choose viewing and review tools, or use write mode for drawing and modification commands.
- Export an offline HTML viewer if needed.
Verdict
CAD Viewer combines browser-based drawing access with editing, review, measurement, and offline export options. Check the mode and export requirements first, since read-only mode disables editing tools.
Questions
How much does CAD Viewer cost?
The Free plan is listed as free. The pricing note describes it as open source.
What file types does it support?
The listed drawing formats are DWG and DXF.
Which platforms does it support?
The listed platform is web. Its responsive interface adapts to phones, tablets, and desktops.
Can I edit drawings?
Yes. Write mode supports creating, editing, and deleting drawing entities with AutoCAD-style drawing and modification commands. Read-only mode disables those commands.
Can the viewer work offline?
It can export a self-contained HTML viewer that opens offline and supports pan, zoom, layers, and distance measurement.
Can it be embedded or connected to Google Drive?
The maker describes iframe and npm embedding and lists a Google Drive integration for opening drawings.
Facts from CAD Viewer's own pages
- Company details
- The opened maker pages identify the product as MLightCAD but do not state its headquarters or founding year. · mlightcad.com, 4 Oct 2026
- Drawing support
- It displays model space, layouts, layers, blocks, and external references. · mlightcad.com, 4 Oct 2026
- Editing
- Write mode supports creating, editing, and deleting drawing entities, with AutoCAD-style drawing and modification commands. · mlightcad.com, 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. · mlightcad.com, 4 Oct 2026
- Integrations
- The maker describes embedding through iframe or npm and lists a Google Drive integration for opening drawings from Drive. · mlightcad.com, 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. · mlightcad.com, 4 Oct 2026
- Languages
- The documentation lists English, Chinese, Arabic, Czech, Turkish, Japanese, and Korean interfaces. · mlightcad.com, 4 Oct 2026
- Measurements
- Measurement tools include distance, area, angle, and arc-length measurements, which can be exported as a JSON sidecar file. · mlightcad.com, 4 Oct 2026
- Notable limit
- Read-only mode disables markup, drawing, and modification commands. · mlightcad.com, 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. · mlightcad.com, 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. · mlightcad.com, 4 Oct 2026
- Purpose
- CAD Viewer is a browser-based WebGL runtime for viewing and editing DWG/DXF drawings. · mlightcad.com, 4 Oct 2026
- Review
- Review tools add markups such as arrows, text, clouds, rectangles, circles, and callouts over a read-only drawing background. · mlightcad.com, 4 Oct 2026
- Supported devices
- The responsive interface adapts to phones, tablets, and desktops and documents touch operations for mobile. · mlightcad.com, 4 Oct 2026
Where CAD Viewer stands on Freedom251
- CAD Viewer Software#10 of 31