wassemble

wassemble is a JavaScript tool to convert WebAssembly standard textual format (wat) to binary (wasm). It is a single file of JavaScript with no dependencies.

Note, wabt is a more full-featured toolkit for working with WebAssembly, both in textual and binary formats, and includes a tool called wat2wasm. However sometimes you just want a simple JS file to drop into your projects; that's what wassemble is about. You could think of it as a clone of wabt's wat2wasm, but built in a different way.

Differences from wabt

Unlike wat2wasm, wassemble does minimal error-checking. Notably, it doesn't type-check the module; it assumes the WebAssembly implementation will signal any validation-time errors when the module is instantiated. As such, this tool is most useful for compiling known-valid wat files, or for generating known-invalid modules for fuzzing or testing purposes.

Install

npm install wassemble

As this project has no dependencies, alternately you can just drop wassemble.mjs anywhere in your project tree.

License

wassemble is available under the Blue Oak Model License, version 1.0.0. See LICENSE.md for full details.