Open CAD Studio

OCS is a CAD application for 2D drafting and 3D modeling, built with Rust. Reads and writes DWG and DXF files natively. Also has a web version now!

OCS Web try it in the browser: https://hakanseven12.github.io/OpenCADStudio/

Features

File Formats

• DWG read/write (R13 through R2018)
• DXF read/write (R13 through R2018)
• STL export (STLOUT / EXPORTSTL)
• STEP AP203 export (STEPOUT)
• OBJ import (IMPORTOBJ)
• PDF export (plot layouts to PDF)
• WBLOCK — write selected entities or a block to an external file
• XREF — attach, reload, and auto-resolve external references

2D Drafting

3D Modeling

Annotations & Dimensions

• Dimensions: Linear, Aligned, Angular, Radial, Diameter, Ordinate — with full DIMSTYLE support (DIMASZ, DIMSCALE, DIMEXO, DIMEXE, and more)
• Text: MTEXT, TEXT, DTEXT with font browser (STYLE DIALOG)
• Leaders: MLEADER with straight and spline path types; MLEADERSTYLE manager
• Tolerances: GD&T feature control frames
• Tables: TABLE entity render; TABLESTYLE manager
• MLine: MLINE entity with MLSTYLE manager and EXPLODE support

Paper Space & Layouts

• Multi-tab layout system with model space and unlimited paper space tabs
• Viewport projection: Model content correctly projected into paper-space viewport rectangles
• Camera persistence: View position and zoom saved per layout; restored on file open and tab switch
• Correct paper size: Physical paper dimensions read from embedded PlotSettings (not drawing limits)
• Inline MSPACE overlay — enter a viewport with double-click; edit model entities in place
• VPORTS — preset viewport configurations (single, 2H, 2V, 4-way)
• LAYOUTMANAGER / LAYOUTPANEL — GUI layout manager
• PLOTSTYLEPANEL / STYLESMANAGER — plot style table editor (CTB/STB)
• PRINT — send layout to system printer

Blocks & References

• INSERT with attribute prompting (ATTREQ)
• ATTEDIT — edit block attribute values interactively
• REFEDIT / REFCLOSE — in-place block reference editing
• XREF — attach, reload, and resolve external DWG/DXF references
• DATAEXTRACTION — export entity property data to CSV

Snapping & Precision

• Object snaps: Endpoint, Midpoint, Center, Node, Quadrant, Intersection, Perpendicular, Tangent, Nearest, Insertion, and more
• Ellipse arc endpoints, LWPolyline arc midpoints, Hatch boundary points
• Object Snap Tracking (OTRACK / F11)
• Polar Tracking with configurable angle increment
• Dynamic Input overlay (DYNMODE / F12)
• Grid snap with adaptive spacing
• Command history navigation (↑ / ↓)

Rendering

• GPU-accelerated via WebGPU (wgpu)
• 4× MSAA anti-aliasing
• Orthographic and perspective camera
• ViewCube with face/edge/corner snapping
• Wide polylines: LWPolyline and Polyline2D filled strokes
• Raster images: GPU-textured quad pipeline (IMAGE command)
• Wipeout: Solid fill masking
• Complex linetypes: Text and shape elements rendered in linetype patterns
• White/black entity colors adapt to background luminance
• Per-viewport background color (BACKGROUND)
• Visual style selector (Wireframe, Shaded, etc.)
• X-ray ghost pass for selected wires occluded by geometry

UI

• Modular ribbon interface — Home, Insert, Annotate, View, Manage, Layout
• Command line with autocomplete and history
• Layer Manager with per-viewport freeze columns
• Properties panel
• COLORSCHEME — runtime theme switching
• SHORTCUTS — keyboard shortcuts panel
• SPLINEDIT — close, open, reverse spline control points
• UCS icon with 3D foreshortening and axis labels

Installation

Linux (AppImage)

Download OpenCADStudio-*-linux-x86_64.AppImage from the latest release, then:

chmod +x OpenCADStudio-*-linux-x86_64.AppImage
./OpenCADStudio-*-linux-x86_64.AppImage

No installation required — runs directly on any modern Linux distribution.

Windows

Download OpenCADStudio-*-windows-x86_64.exe from the latest release and run it directly. Windows SmartScreen may show "Windows protected your PC" because the binary is not yet code-signed — click More info → Run anyway.

macOS (Apple Silicon)

Apple Silicon (M-series) only; Intel macOS isn't built. The app is ad-hoc signed but not Apple-notarised (notarisation requires a paid Apple Developer ID), so macOS Gatekeeper guards the first launch. Pick whichever path is easiest:

Option A — Homebrew (recommended):

brew install --cask --no-quarantine \
  https://raw.githubusercontent.com/HakanSeven12/OpenCADStudio/main/packaging/homebrew/open-cad-studio.rb

--no-quarantine lets Gatekeeper skip the unsigned-app prompt. See packaging/homebrew/ for publishing this as a brew tap.

Option B — manual .dmg:

Download OpenCADStudio-*-macos-arm64.dmg from the latest release, open it, and drag OpenCADStudio.app to /Applications. If the first launch is blocked, clear the quarantine flag once:

xattr -dr com.apple.quarantine /Applications/OpenCADStudio.app

On older macOS you can instead right-click OpenCADStudio.app → Open and confirm; on macOS Ventura and later, approve it via System Settings → Privacy & Security → Open Anyway.

Build from Source

Requirements: Rust 1.75+

git clone https://github.com/HakanSeven12/OpenCADStudio.git
cd OpenCADStudio
cargo build --release --bin OpenCADStudio
./target/release/OpenCADStudio

License

GPL-3.0-only — see LICENSE