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Dev tools · October 28, 2026

Nasscad – local-first 3D CAD for browser and Windows

Powerful Web-Based 3D Modeling & CSG Engine.

Nasscad – local-first 3D CAD for browser and Windows launched on October 28, 2026 with 26 votes, #760 of 4,962 launches that month and more than 95% of that year's launches.

Visit nasscad.com ↗Alternativestop 15% of October 2026

In plain words

Nasscad is a browser-based 3D CAD tool that runs as a single HTML file without installation or login. It supports non-destructive CSG boolean operations, STEP import/export with multi-body assemblies, and 18 parametric primitives. Users can view and edit 3D models directly in the browser, with optional export to STL, OBJ, and 3MF formats. Advanced boolean operations require the free MEDUSA companion engine for Windows.

written from the facts on this page · October 2026

From the sources

"NASSCAD is a high-performance, web-based 3D design tool. Features a non-destructive CSG engine, watertight manifold primitives, and advanced export (STL, OBJ, 3MF). No install, zero-latency, just pure 3D modeling."

Free online STL viewer and browser-based 3D CAD. STEP AP242 import/export with PMI / GD&T extraction, 18 parametric primitives, boolean CSG. Zero install, no login, single HTML file. Fusion 360 ✓ FreeCAD ✓

Exact analytical solids in your browser. Import, edit and export native STEP B-Rep — multi-body assemblies, OpenCASCADE WASM. Since V4.7.0 there is no WebAssembly fallback : boolean operations — Union, Subtract, Intersect — require the free MEDUSA companion engine (Windows x64, 20 MB, portable). Everything else — STEP AP242 import/export, the 18 primitives, the generators, NassScript and every export format — runs in the browser with nothing installed. A full 3D parametric CAD application delivered as a single HTML file. No server, no account, no installation. Runs entirely in your browser via WebGL and WebAssembly — online or offline. Designed for people who…from nasscad.com

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