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MLightCAD Viewer

Free#18 of 32 in CAD Viewer Software

MLightCAD Viewer: A capable open-source browser viewer for measuring, marking up, and editing CAD drawings. Ranked #18 of 32 in CAD Viewer Software by our editors (7.1/10); pricing: Open source; best for open-source browser-based markup and measurement.

7.1/10Editor score

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MLightCAD Viewer7.1 Visit MLightCAD

At a glance

Editor score
7.1 / 10
Pricing
Open source
Best for
Open-source browser-based markup and measurement
Paid from
Free
Measurement tools
Yes
Facts checked
22 Sep 2026

Where it wins
- Opens DWG and DXF files with client-side parsing and rendering
- Combines measurement, markup, and drawing-entity editing tools
- Exports drawings as self-contained offline HTML files
Where it doesn't
- Web-only access may not suit users seeking a native desktop application
- Markup exchange relies on JSON sidecar files
- Offline sharing centers on HTML export rather than a broader export set

Our verdict on MLightCAD Viewer

MLightCAD Viewer is an open-source, browser-based CAD viewer and editor for people who need to inspect, measure, annotate, or make direct changes to DWG and DXF drawings. It runs parsing and rendering in the browser without a backend service, while supporting desktop, tablet, and mobile interfaces. The feature set is aimed at drawing review and light editing rather than a broad, full CAD production workflow, making it a practical fit for users who want an accessible web tool for technical files.

Its strongest area is the combination of measurement and markup. Users can measure distance, area, angle, coordinates, and arc length, then add arrows, text, clouds, shapes, and callouts. Markups can be imported or exported through JSON sidecar files, which gives review annotations a defined exchange format. Layer management and switching between model space and paper space add useful navigation for drawings with multiple presentation contexts. Direct creation, editing, and deletion of drawing entities extends the product beyond a read-only viewer.

The browser-first design also shapes where MLightCAD Viewer fits. Self-contained offline HTML export supports sharing a portable view, and the product can be embedded into other web applications. At the same time, users who require a native desktop workflow or a more expansive CAD authoring environment should look elsewhere. Choose MLightCAD Viewer for open-source DWG/DXF review, measurement, markup, and focused entity editing across responsive web devices; choose an alternative when native-app workflows or broader CAD production capabilities are the priority.

Your product? Our editors can test MLightCAD Viewer in depth and publish a review, labelled as paid · from $149/mo →

MLightCAD Viewer pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.

See plans on mlightcad.com

MLightCAD Viewer fact sheet

Free plan	Not verified
Paid from	Free
DWG support	Yes
Measurement tools	Yes
Markup and annotation	Yes
Sharing and collaboration	Yes
Platforms	Cross_platform
DXF support	Yes
Deployment	Cloud
Platforms	Web
Support	Community, Docs
Built for	Solo, Small business, Mid-market, Enterprise (editorial estimate)
Pricing	Open source
Website	mlightcad.com
Facts checked	22 Sep 2026

Alternatives to MLightCAD Viewer

See all MLightCAD Viewer alternatives →

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used MLightCAD Viewer for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

MLightCAD Viewer is listed in our CAD Viewer Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 7 Oct 2026 · How we research and update