Command line first
Type LINE, PLINE, CIRCLE, ARC, OFFSET, TRIM, EXTEND, FILLET, ARRAY, MIRROR — with autocomplete. If your hands already know the commands, they still work here.
OCS · v2026.36 · Free software · GPL-3.0
Draft in the browser.
Save real DWG.
OpenCADStudio is an open-source CAD application, built in Rust and compiled to WebAssembly, that reads and writes DWG and DXF natively. This site launches its browser build: a command-driven workspace for precise 2D drafting, layouts, hatches and kernel-backed 3D modeling — no account, no install.
Runs in the current tab, or open in a new tab · view the source on GitHub · v2026.36 release notes
The workspace
A drafting board that speaks the language you already draw in
Layers that behave
A full layer manager with a properties panel: colour, linetype, lineweight, on/off, freeze and lock, the way a drawing expects to be organised.
Object snaps
Endpoint, midpoint, centre, quadrant, intersection, perpendicular, tangent, nearest — plus snap tracking, polar tracking and dynamic input for precise placement.
Real dimensions
Linear, aligned, angular, radial, diameter and ordinate dimensions with DIMSTYLE support, alongside MTEXT, leaders and tables.
Blocks & references
Insert blocks with attribute prompting, edit them in place, and attach external references so shared details stay shared.
Layouts & viewports
Model and paper space with a multi-tab layout system, clipped viewports and plot-style support for complete drawing sheets.
Kernel-backed 3D
Create solid primitives and shape them with extrusion, revolution, sweep, loft and Boolean operations in orthographic or perspective views.
OpenCAD Projects · start free
Take your drawing from draft to client.
Save directly from the workspace into private project folders. Try one free project with three saved revisions. Reopen earlier work and share a client link you can revoke. No card required.
File formats
Native DWG and DXF, read and written directly
OpenCADStudio opens and saves DWG and DXF itself — no round-trip through an intermediate format, no export service. Save targets from R14 to R2018 are supported in both directions, so the file you save opens in the rest of your toolchain exactly as a drawing file should.
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
Current release — v2026.36
The shared core, with browser-shaped edges
Version 2026.36 brings the same core drawing and modeling engine to the browser, including rendered hatches and 3D solid operations. A few operating-system integrations still belong to the desktop builds.
2D and 3D in the browser
Drafting, hatches, layouts and kernel-backed solid modeling run in the WebAssembly build.
Local drawing files
Drawings are selected in the browser and saves are downloaded back to your device.
Desktop-only integrations
Native plugins, system printing, PDF output, scripts and headless automation require the desktop app.
Single-threaded web build
The WebAssembly build runs sequentially, so the desktop app remains the better fit for the largest drawings.
Open by design
No account wall between you and your drawing
Hosted browser CAD services — AutoCAD Web, ARES Kudo, SnapCAD — put sign-up, subscription tiers or cloud project storage in front of the drawing board. OpenCADStudio takes the other path: it is free software under GPL-3.0, the page loads straight into the workspace, and your DWG and DXF files are opened and saved through your browser's own file dialogs. Its 2D and 3D tools share the same Rust core as the desktop app, while operating-system integrations remain desktop-only. The complete source code is public, so nothing about how it works is taken on trust.
- LICENCE
- GPL-3.0
- PRICE
- 0.00
- ACCOUNT
- NOT REQUIRED
- SOURCE
- PUBLIC
The board is set. Draw.
The workspace opens in this tab; the first load fetches the WebAssembly build, so give it a moment. Prefer a separate window? Open the app in a new tab.
Launch CAD