A simple event-driven library for parsing WebAssembly binary files.

webassembly, wasm, parser



A Bytecode Alliance project

Rust tooling for low-level manipulation of WebAssembly modules

Tools included

This project is intended to house a number of tools related to the low-level workings of WebAssembly. The top-level crate here ties everything together but isn't currently intended for general use. Instead you probably want to take a look at the sub-crates:

  • wasmparser - a library to parse WebAssembly binaries
  • wat - a library to parse the WebAssembly text format
  • wast - like wat, except provides an AST
  • wasmprinter - prints WebAssembly binaries in their string form


This project is licensed under the Apache 2.0 license with the LLVM exception. See LICENSE for more details.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this project by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.