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Introduction

Wasmrun is a WebAssembly runtime that simplifies development, compilation, and execution of WASM applications across multiple programming languages.

Three Modes​

Server Mode — wasmrun run​

Compile and serve WebAssembly projects with a built-in dev server, live reload, and browser-based module inspection.

wasmrun run ./my-rust-project --watch

Exec Mode — wasmrun exec​

Run WASM files natively using a built-in interpreter with WASI support. No browser, no server.

wasmrun exec ./program.wasm arg1 arg2

OS Mode — wasmrun os​

Browser-based execution environment with a WASM virtual machine, virtual filesystem, and multi-language runtime support.

wasmrun os ./my-node-project

Key Features​

  • Multi-Language — Rust, Go, Python, C/C++, AssemblyScript via plugins
  • Plugin Architecture — extensible system for language support and build tools
  • Live Reload — file watching with auto-recompilation
  • Native Execution — built-in WASM interpreter with WASI syscalls
  • OS Mode — browser-based sandboxed execution with network isolation
  • Zero Config — auto-detects project type, sensible defaults

Getting Started​

  1. Install wasmrun
  2. Quick start guide
  3. Pick a mode: Server, Exec, or OS