ABViewer vs CADViewer by Orua

ABViewer lets users view, edit, measure, convert, and print CAD files, 3D models, and raster images. It supports CAD, vector, 3D, complex, raster, and archive formats including DWG, DXF, STEP, IGES, PDF, STL, SVG, and ZIP. For 2D drawings, users can manage layers, blocks, dimension and text styles, snapping, comments, and markups. Measurement tools cover 3D distances, face heights, surface areas, and curvilinear edge radii, with section-view creation. Conversion options include STL, OBJ, DWG/DXF, supported 2D formats, and STEP or SAT/SAB export for parametric models. The software can generate CNC G-code from 2D drawings. Enterprise adds PDF-to-DWG/DXF conversion, batch conversion and printing, file comparison, and command-line features. ABViewer runs on Linux and Windows; Windows downloads include 32-bit and 64-bit version 16 builds. A free 30-day trial is available. Paid options include subscriptions and lifetime licenses. Professional user licensing starts at $30 a month, billed every three months.

CADViewer by Orua is a free, open-source browser viewer for large engineering drawings and read-only previews. It opens DWG, DXF, STL, STEP/STP, IGES/IGS, and BREP/BRP files through one entry point and toolbar. DWG and DXF files are parsed in a Web Worker with LibreDWG WebAssembly and rendered progressively using Canvas 2D and Path2D. Three-dimensional formats use OpenCascade WebAssembly and WebGL, with selectable metal surface finishes. Controls include pan, wheel zoom, fit-to-view, zoom window, drawing-list visibility, and light or dark backgrounds. Fonts can load on demand, and deployment configuration supports Simplified Chinese and English. The viewer runs on a static web server without an application server or database, with offline or private-network options. Locally selected files stay in browser processing without an account or upload API. It is read-only and lacks editing, property panels, selection workflows, and plugins.