Afonsop
9262d63fcd
A different-methods review round (seeded fuzzing over the pure logic,
manual mutation testing of the suites, mechanical static scans) found
what the code-reading rounds could not:
Fuzz (randomized inputs, minimized repros):
- json_values_match matched unequal integers beyond f64 precision:
the mixed integer/float arms compared via `as f64`, so every u64
past 2^53 round-tripped onto a neighbouring float and a
compare-and-set could pass against a DIFFERENT value. Whole floats
now equal an integer only when it is exactly representable
(round-trip lossless); pinned by a regression test the mutation
round had shown was missing.
- recovered_name smuggled path separators through the extension
("a.b/c" -> "a (recovered).b/c") because only the head was
reduced to its final path component — the whole input is now
sanitized first, and the empty-stem fallback uses the sanitized
component, which also restores idempotence for separator-headed
names ("/.dwg" used to alternate across crash cycles).
Mutation (12 one-line mutations, 9 caught / 4 survived — the
survivors were the holes, now closed):
- PDF tie order image-vs-wire-fill was untested (rank swap passed all
17 pdf_export tests) — see follow-up note; snap endpoint-map bucket
width and the drop-queue cap remain native-untestable (wasm-only
modules) — noted as the structural gap, not fixed here.
Static scans (panic reachability / unbounded growth / lock ordering):
- no reachable input-driven panic in the branch's new code; no
inconsistent lock ordering; the image source registry and the
pdf_raster page/source caches lack any cap or eviction (the xref
registry's SOURCE_CAP LRU is the in-repo template) — flagged,
deferred as follow-up rather than rushed at the end of a session.
The fuzz suite itself (tests/fuzz_round.rs, 12 properties, 4 seeds)
ships with replicas updated to the fixed logic — all green.
English · Български · Português (Brasil) · Čeština · Nederlands · Français · Suomi · Deutsch · Ελληνικά · Magyar · Italiano · 日本語 · 한국어 · Polski · Русский · 简体中文 · Español · 繁體中文 · Türkçe · हिन्दी · العربية
Open CAD Studio
Open-source 2D drafting and 3D modeling for desktop and web, built with Rust.
Launch the web app · Download the desktop app · Join the discussion
Overview
Open CAD Studio is a cross-platform application for technical drawing, layout work, and solid modeling. It reads and writes DWG and DXF drawings natively, with a shared editing core across the desktop and browser versions.
The project is under active development. Keep backups of important production drawings and report reproducible problems through GitHub Issues.
Highlights
- Native drawing workflow — open, edit, recover, and save DWG and DXF files without a conversion service.
- Precise 2D drafting — lines, polylines, curves, splines, hatches, object snaps, tracking, layers, blocks, and external references.
- Documentation tools — text, dimensions, leaders, tolerances, tables, model space, paper space, viewports, and plot styles.
- Kernel-backed 3D modeling — solid primitives, extrusion, revolution, sweep, loft, Boolean operations, and ACIS entity tessellation.
- GPU rendering — accelerated 2D and 3D viewports through
wgpu, with orthographic and perspective cameras. - Extensible workflows — native plugins, command scripts, headless conversion, and a line-based JSON automation API.
File workflows
| Format or workflow | Support |
|---|---|
| DWG | Read and write; versioned save targets from R14 through 2018 |
| DXF | Read and write; versioned save targets from R14 through 2018 |
| BAK / SV$ | Open drawing backups and autosave files |
| OBJ | Import polygon meshes |
| LandXML | Import CgPoint survey points |
| STL | Export 3D mesh data |
| STEP AP203 | Export 3D mesh data |
| Plot layouts and selected geometry on desktop | |
| CSV | Extract entity property data |
| CTB / STB | Load and edit plot style tables |
Desktop or web
Use the web app for immediate access with no installation. Drawings are selected through the browser and saved as local downloads.
The web app also accepts a ?file= URL parameter, so a shared or embedded link can open a drawing directly: ?file=<url-encoded https://example.com/plan.dwg> fetches and opens that drawing (only http(s) URLs ending in a .dwg/.dxf name), while ?file=plan.dwg reopens a drawing previously opened in the same browser. Opening from another origin is announced on the command line before the fetch starts.
Use the desktop application for native file associations, file-manager thumbnails, system printing, PDF output, external plugins, command scripts, and headless automation. Release builds are available for Windows, Linux, and Apple Silicon macOS.
Install
Download all current packages from the latest release.
Windows
Choose one of these signed x86-64 packages:
OpenCADStudio-*-windows-x86_64-installer.msi— recommended installer with Start Menu shortcuts, DWG/DXF file associations, and drawing thumbnails.OpenCADStudio-*-windows-x86_64-portable.exe— standalone application; no installation required.
Linux
Download the x86-64 AppImage, make it executable, and run it:
chmod +x OpenCADStudio-*-linux-x86_64.AppImage
./OpenCADStudio-*-linux-x86_64.AppImage
macOS
The published macOS package supports Apple Silicon:
- Download
OpenCADStudio-*-macos-arm64.dmg. - Open the image and drag
OpenCADStudio.appinto Applications. - If Gatekeeper blocks the first launch, approve the app from System Settings → Privacy & Security.
The application is ad-hoc signed but is not currently notarized by Apple.
Languages
Open CAD Studio can follow the system language or use any of these 21 interface languages:
Arabic · Brazilian Portuguese · Bulgarian · Czech · Dutch · English · Finnish · French · German · Greek · Hindi · Hungarian · Italian · Japanese · Korean · Polish · Russian · Simplified Chinese · Spanish · Traditional Chinese · Turkish
Change the language from the application settings. The browser version also uses the browser's preferred locale when System is selected.
Build from source
Desktop
Requirements:
- Git
- Current stable Rust toolchain
- Platform graphics and font development libraries
On Ubuntu or Debian, install the native dependencies with:
sudo apt update
sudo apt install libgl1-mesa-dev libx11-dev libxcursor-dev libxi-dev \
libxrandr-dev libxkbcommon-dev libwayland-dev libfontconfig1-dev \
libfreetype6-dev
Then build and run:
git clone https://github.com/HakanSeven12/OpenCADStudio.git
cd OpenCADStudio
cargo build --release --bin OpenCADStudio
The resulting binary is written to target/release/OpenCADStudio (OpenCADStudio.exe on Windows).
Web
Install the WebAssembly target and build tools once:
rustup target add wasm32-unknown-unknown
cargo install trunk wasm-bindgen-cli
Start the development server:
trunk serve
Build the deployable bundle (runs the release Trunk build, then re-syncs and
verifies web/fonts in dist/app/fonts, so the fonts the app fetches can
never go missing from the bundle):
sh scripts/build-web.sh
The bundle ships a service worker (web/sw.js, deployed at /app/sw.js) that caches the app shell: after a first online visit registers it, the assets are captured on the following visit and the app then starts fully offline, the ~55 MB wasm bundle served from the browser cache instead of re-downloaded. A long-lived installed window keeps running its current version until all its tabs close (no mid-session disruption); the next launch picks up the update. build-web.sh stamps a hash of the finished bundle into sw.js as the cache version, so every deploy ships a fresh cache and stale ones are cleaned up automatically. /app/ carries its own web app manifest, so the editor itself can be installed as a standalone app.
Automation
The desktop binary supports one-shot conversion, a persistent headless server, and a client-neutral MCP endpoint for AI applications:
OpenCADStudio --export input.dwg output.dxf
OpenCADStudio --serve
OpenCADStudio --serve --port 4242
OpenCADStudio --mcp
The automation server exchanges one JSON object per line over standard input/output or a local TCP socket. The self-contained MCP endpoint exposes the live desktop editor through the same tools to every compatible client. To connect a client, configure it to launch OpenCADStudio --mcp. See the MCP control guide.
Plugins
Desktop plugins run in separate processes and communicate with the host through the versioned plugin API. The browser build does not load native plugins.
Project documentation
Contributing
Bug reports, focused pull requests, translations, documentation improvements, and plugin contributions are welcome.
- Search existing issues before opening a new report.
- Use Discussions for questions and ideas.
- Report vulnerabilities privately by following the security policy.
Application translations live in locales/*/opencadstudio.ftl; source labels map through
src/locale_catalog.rs. After editing translations, run python3 scripts/export-locales.py
to refresh web and desktop packaging labels. Validate with python3 scripts/test_site.py
and cargo test --lib i18n::tests.
Project growth
Stars
Release downloads
Support the project
If Open CAD Studio helps your work, support continued development through GitHub Sponsors or Patreon.
License
Open CAD Studio is distributed under the GNU General Public License v3.0.