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Quick summary
Wasmtime is a standalone runtime that executes WebAssembly modules and supports the WebAssembly System Interface (WASI). It runs outside of browsers and can be used directly on Windows systems to run Wasm binaries.
How it runs code
- Uses ahead-of-time (AOT) compilation and just-in-time (JIT) techniques to convert Wasm into native code.
- Employs the Cranelift code generator as its primary backend for efficient compilation.
Safety and licensing
Wasmtime runs code inside a restricted sandbox to limit what untrusted modules can do, helping prevent dangerous access. It is distributed under a permissive, free license, making it accessible for open-source and commercial use.
Ways to use it
Wasmtime can be used straight from the command line for quick execution and testing, and it also provides a library API so applications can embed the runtime and call into Wasm modules programmatically.
Alternative suggestion
- WinDjView — Free
Technical
Title
Wasmtime
Requirements
- Windows
Language
No language has been specified.
Available languages
License
- Free
Latest update
2025-12-28
Author
Bytecode Alliance
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