OrcaWeb
OrcaSlicer v2.4.2 running entirely in your browser via WebAssembly.
Slice STL files locally — no server, no account, no upload. Your files never leave your device.
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:lock: 100% Private
Your STL files are processed locally. No data is ever sent to any server.
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:zap: OrcaSlicer Engine
Same slicing quality as the OrcaSlicer desktop app, compiled to WebAssembly via Emscripten.
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:material-layers: G-code Visualiser
Layer-by-layer toolpath preview. Scroll through layers with a slider. Model and G-code rendered in the same coordinate system.
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:package: Profile Import
Import machine, filament, or process profiles directly from your OrcaSlicer desktop installation.
Quick start
Clone, install, download the WASM engine, and run the dev server — see the full setup guide for the commands and prerequisites.
Try it online
The slicer is deployed at hiosdra.github.io/OrcaWeb/app/.
On first load, the browser downloads ~29 MB of WASM data from GitHub Releases. Subsequent visits use the browser cache (or the PWA service worker pre-cache).
How it works
A React UI on the main thread hands STL/3MF/OBJ/STEP files to a Web Worker running the OrcaSlicer engine compiled to WebAssembly, and gets G-code back.