StrapKit

A full Node.js runtime compiled to WebAssembly that runs natively in the browser. Run Node.js applications, shell commands, and dev servers entirely client-side — no backend required.

Features

• Node.js in the browser — Full Node.js environment via WebAssembly, including core modules (fs, path, crypto, etc.)
• Shell execution — Run shell scripts and commands with exec(), capturing stdout/stderr with streaming support
• Built-in native tools — Full coreutils tools and git
• In-browser file system — In-memory file system for reading, writing, and manipulating files
• Dev server previews — Embed iframe previews of web servers running inside the WASM environment
• Caching — Built-in caching for fast subsequent loads
• Port detection — Automatically detect when TCP sockets start listening

Install

npm install @strapkit/core

Quick Start

import Strapkit from "@strapkit/core";

const sk = new Strapkit({ apiKey: "your-api-key" });
await sk.init();

const result = await sk.exec("node -e 'console.log(\"hello world\")'");
console.log(result.stdout);