CADViewer by Orua

Web · Self-hosted

Freedom report

Two barsScore 6.3

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

CADViewer by Orua is ranked #8 of 31 in CAD viewer software on Freedom251. It runs on Self-hosted, Web. There is a free plan.

CADViewer by Orua plans and pricing

All plans

CADViewer Free Open-source browser viewer · read-only · self-hosted static deployment github.com · 4 Oct 2026

Compared on CAD viewer software

DWG support: Yes
Platforms: web
DXF support: Yes

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The record

Purpose: CADViewer is an open-source browser CAD viewer designed for large engineering drawings and read-only previews.
File formats: It opens DWG, DXF, STL, STEP/STP, IGES/IGS, and BREP/BRP through one file entry and toolbar.
Large drawing rendering: DWG/DXF parsing runs in a Web Worker with LibreDWG WebAssembly and progressively renders entities using Canvas 2D and Path2D.
3D previews: Three-dimensional formats are processed locally with OpenCascade WebAssembly and displayed with WebGL, with selectable metal surface-finish previews.
Navigation: The viewer supports pan, wheel zoom, fit-to-view, zoom window, drawing-list visibility, and light or dark backgrounds.
Fonts and languages: It defers SHX, TTF, OTF, and WOFF font loading and supports Simplified Chinese and English through deployment configuration.
Deployment: CADViewer can be deployed on a static web server without an application server or database, and it documents offline or private-network configuration.
Privacy: Locally selected files are parsed in the browser, and the viewer does not require an account, application backend, or drawing-upload API.
Security caveat: The project notes that a hosting site may retain ordinary web-server access logs.
Read-only limits: It does not provide CAD editing, entity-property panels, selection workflows, or a plugin system.
File fidelity limits: External raster images, proxy objects, and uncommon custom entities may not render, while missing fonts can change text appearance.
Capacity limits: The project says supported drawing size depends on the drawing, browser, device memory, entity complexity, nested blocks, hatches, and fonts.
Licensing: The repository says LibreDWG WebAssembly components are distributed under GPL-3.0-or-later and other components retain their respective licenses.
Intended audience: The project is aimed at users who need to preview large AutoCAD drawings in a browser, including through self-hosted deployment.
Price from: Free

Where it ranks on Freedom251

Best CAD Viewer Software in 2026#8 of 31

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Sources

github.com/Orua/CADViewer· checked 4 Oct 2026