Wasmer Has a Free WebAssembly Runtime — Run Any Language at Near-Native Speed

Wasmer Runs WebAssembly at Near-Native Speed

Docker containers are 100MB+. WebAssembly modules are kilobytes. Wasmer lets you run code from any language as lightweight Wasm modules.

What Wasmer Does

• Multi-language — compile Rust, C/C++, Go, Swift to Wasm
• Near-native speed — Cranelift/LLVM/Singlepass compilers
• Sandboxed — each module runs in isolation
• WASI support — file system, network, env access
• Package registry — wapm.io for sharing Wasm packages
• Embeddable — use as library in Rust, Python, Go, JS

Quick Start

curl https://get.wasmer.io -sSfL | sh
wasmer run python/python -- -c "print('Hello from Wasm!')"

Embed in Python

from wasmer import engine, Store, Module, Instance
store = Store()
module = Module(store, open("add.wasm", "rb").read())
instance = Instance(module)
result = instance.exports.add(5, 37)  # 42

Wasmer vs Docker

Feature	Wasmer	Docker
Startup	Microseconds	Seconds
Size	KBs	MBs-GBs
Isolation	Wasm sandbox	Namespaces
Portability	Any OS	Linux-native

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📧 [e-mail] — WebAssembly consulting

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