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🚀 WasmHub

Open-source WASM Hub of language runtimes

Download and manage WASM runtimes for Node.js, Python, Ruby, PHP, Go, and more - all in one place.

🎯 What is this?

A centralized, open-source repository providing versioned WASM language runtimes that can be:

Downloaded once, cached forever
Used in any Rust project as a library
Accessed via CLI tool
Fetched via CDN for browser usage

Think of it as: A package registry for WASM language runtimes (like npm, but for runtime binaries).

⚡ Quick Start

As a Library (Rust)

# Cargo.toml
[dependencies]
wasmhub = "0.1"

use wasmhub::{RuntimeLoader, Language};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let loader = RuntimeLoader::new();

    // Download Go 1.23 (auto-cached)
    let go = loader.get_runtime(Language::Go, "1.23").await?;

    println!("Runtime at: {}", go.path.display());
    Ok(())
}

As a CLI Tool

# Install
cargo install wasmhub --features cli

# Download runtimes
wasmhub get go@1.23
wasmhub get rust@1.82

# List available
wasmhub list

# Show info
wasmhub info go

Via CDN (Browser)

// From GitHub Releases
const url = 'https://github.com/anistark/wasmhub/releases/latest/download/go-1.23.wasm';
const response = await fetch(url);
const wasmBytes = await response.arrayBuffer();

🌟 Features

✅ Multi-language support - Go, Rust (more coming soon)
✅ Version management - Pin to specific versions
✅ Smart caching - Download once, use forever
✅ Type-safe API - Rust library with compile-time guarantees
✅ Fast downloads - Parallel, resumable transfers
✅ CDN distribution - Served via jsDelivr for browser access
✅ SHA256 verification - Integrity checks built-in
✅ Cross-platform - Works on Windows, macOS, Linux

📦 Available Runtimes

Language	Versions	Size	Status	About
Go	1.23	261KB	🚀 Upcoming Release	Built with TinyGo, supports filesystem, env, args, stdio
Rust	1.82	76KB	🚀 Upcoming Release	Full std library support with wasm32-wasip1 target
Node.js	-	-	🚧 Coming Soon	-
Python	-	-	🚧 Coming Soon	-
Ruby	-	-	🚧 Coming Soon	-
PHP	-	-	🚧 Coming Soon	-

More languages and versions coming soon! Contributions welcome. ✨

📥 Downloading Runtimes

WASM runtime binaries are built and published automatically on each GitHub Release.

From GitHub Releases

# Download the latest Go runtime
curl -LO https://github.com/anistark/wasmhub/releases/latest/download/go-1.23.wasm

# Download a specific version's manifest
curl -LO https://github.com/anistark/wasmhub/releases/download/v0.1.0/manifest.json

Using the CLI

# The CLI automatically fetches from releases
wasmhub get go@1.23

Manifest Format

Each runtime has a manifest.json describing available versions:

{
    "language": "go",
    "latest": "1.23",
    "versions": {
        "1.23": {
            "file": "go-1.23.wasm",
            "size": 266712,
            "sha256": "efa1e13f39dfd3783d0eff5669088ab99a1ea1d38ac79f29b02e2ad8ddfea29d",
            "released": "2026-02-03T13:23:13Z",
            "wasi": "wasip1",
            "features": []
        }
    }
}

🚀 Use Cases

1. Browser-Based Development Environments

Build tools like StackBlitz/CodeSandbox without the proprietary runtime:

// Load Node.js in browser
let nodejs_wasm = loader.get_runtime(Language::NodeJs, "20.2.0").await?;
// Run user's project in WASM VM

2. Serverless Edge Functions

Deploy language runtimes to Cloudflare Workers, Deno Deploy, etc.:

wasmhub get python@3.11.7
# Deploy to edge with Python support

3. Testing Frameworks

Run tests in isolated WASM environments:

// Test with specific Node.js version
let node18 = loader.get_runtime(Language::NodeJs, "18.19.0").await?;
run_tests_with_runtime(node18)?;

4. Educational Platforms

Create online code editors with multiple language support:

// Student selects Python 3.12
const runtime = await fetchRuntime('python', '3.12.0');
executeCode(studentCode, runtime);

📖 Documentation

API Documentation - Full Rust API reference
Contributing Guide - Help build this project

🤝 Contributing

We welcome contributions! This project aims to be community-driven.

How to help:

🐛 Report bugs or request features via Issues
🔧 Submit PRs for new runtimes or improvements
📖 Improve documentation
⭐ Star the repo to show support

See CONTRIBUTING.md for guidelines.

🌐 Community & Support

GitHub Discussions: Ask questions, share ideas
Twitter: @anistark

📄 License

MIT License - see LICENSE for details.

🙏 Acknowledgments

This project builds upon the amazing work of:

Pyodide - Python in WASM
ruby.wasm - Ruby in WASM
CodeSandbox - nodebox inspiration
Wasmer - WASM runtime ecosystem

⚡ Why WASM Runtime?

The Problem: Language runtimes for WASM are scattered across different projects. Finding, downloading, and managing them is painful.

The Solution: A single, centralized repository with:

✅ Versioned runtimes for multiple languages
✅ Consistent APIs (Rust library + CLI)
✅ CDN distribution for browsers
✅ Smart caching and integrity verification
✅ Open-source and community-driven

Join us in making WASM runtimes accessible to everyone! 🚀

Made with ❤️ by Kumar Anirudha

wasmhub 0.1.2