Runno provides sandboxed runtimes for programming languages and WASI binaries, targeting educators and developers who need to embed runnable code examples directly into web applications or run them server-side. It simplifies code execution for beginners and enables interactive demonstrations without requiring local installations.

How It Works

Runno leverages WebAssembly (WASM) and the WebAssembly System Interface (WASI) to execute code within a secure, isolated JavaScript environment. It emulates a Unix-like sandbox with a virtual file system, allowing various programming languages (Python, Ruby, C, C++, PHP) and WASI binaries to run directly in the browser or Node.js. This approach offers a consistent execution environment and avoids the complexities of native installations.

Quick Start & Requirements

• Browser: Install @runno/runtime via npm and import it. Use <runno-run runtime="python">...</runno-run> in HTML. Requires specific HTTP headers (Cross-Origin-Opener-Policy: same-origin, Cross-Origin-Embedder-Policy: require-corp) for SharedArrayBuffer support.
• Node.js: Install @runno/sandbox via npm and use runCode("runtime", "code").
• WASI: Use WASI.start(fetch("/binary.wasm"), { ... }).
• Documentation: Runno.dev

Highlighted Details

• Supports multiple runtimes including Python, Ruby, QuickJS, SQLite, Clang, Clang++, and PHP-CGI.
• Enables direct execution of WASI binaries with virtual file system support.
• Provides Web Components for easy integration into web pages.
• Offers a Node.js package for server-side code execution.

Maintenance & Community

The project is actively developed by taybenlor. Community engagement and support channels are not explicitly detailed in the README.

Licensing & Compatibility

Licensed under the MIT License, permitting commercial use and integration into closed-source projects.

Limitations & Caveats

Language availability is limited to those compiled to WASI. Installing external packages or modules within the sandbox is difficult, making it best suited for small, self-contained code examples. WASI preview1 is supported, but preview2 is out of scope.