Thriving 
TS Browser-first parametric CAD: exact B-rep solids on a WebAssembly kernel, replayable feature history, direct on-model editing, STEP in and out. Local-first, with optional cloud projects and live collaboration.
https://zcad.app ↗// readme
OpenZCAD is a browser-first parametric CAD workspace: exact B-rep solid modeling, a replayable feature history, and direct on-model manipulation, with no desktop install. The canonical project document stores named parameters, sketches, and an ordered command history, and a WebAssembly solid kernel rebuilds exact geometry in a background worker. Projects live on your device first; an optional account adds cloud projects, sharing, and live collaboration.
Use the hosted beta at zcad.app.
[!WARNING] OpenZCAD is under active development and should be used at your own risk. Features and behavior may change without notice. Do not rely on the hosted beta as the only copy of important work: cloud projects and account data may be reset, migrated, or not carried forward to a future production release. Keep independent local or exported backups of anything important.
Current Build workspace in the default Essentials panel layout, captured 20 October 2026 from the built-in demos running locally.
Exact parametric modeling. Primitives, multi-profile sketch/extrude, revolve, loft, sweep, booleans, transforms, mirror-copy,…