Apowersoft CAD Viewer vs CAD Viewer

Apowersoft CAD Viewer has no write-up on Specifiction yet; its figures are above.

CAD Viewer is a free, open-source browser WebGL runtime for viewing and editing DWG and DXF drawings. It displays model space, layouts, layers, blocks, and external references. Write mode supports creating, editing, and deleting drawing entities with AutoCAD-style commands. Review tools place arrows, text, clouds, rectangles, circles, 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 product can export a self-contained HTML viewer for offline use with pan, zoom, layers, and distance measurement; exports can be password- and expiry-protected. Full-viewer examples include HTML and PDF export, while the simple viewer offers lazy-loaded HTML, PDF, and SVG plugins. Parsing and rendering occur on the client, and drawings are not uploaded, cached, or mirrored to a server. It can be embedded through iframe or npm, and a Google Drive integration opens drawings from Drive. The responsive interface supports phones, tablets, and desktops, with touch operations documented for mobile. Read-only mode disables markup, drawing, and modification commands.