Wrote a tiny WebAssembly (wat2wasm) compiler in Go
As a personal project I wrote a really tiny Wat 2 Wasm compiler in Go. Mainly for demonstrative and educational purposes. It was tough: I didn't know anything about WebAssembly internals and I'm a newbie with Go... so I tried to document it as much as I could for anyone that would like to approach the quest in the future! It misses a lot of features (that will be gradually implemented). Any feedback is welcomed!! Demo: https://luna-demo.vercel.app
Wrote a tiny WebAssembly (wat2wasm) compiler in Go launched on November 1, 2022 with 75 votes, #707 of 3,471 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
This is a minimal WebAssembly compiler written in Go that converts WebAssembly text format (WAT) to binary format (WASM). Built as an educational project, it's designed to help developers understand WebAssembly internals and Go programming through heavily documented code. The compiler currently lacks many advanced features but aims to gradually expand functionality. It's intended for anyone interested in learning how WebAssembly compilation works rather than production use.
written from the facts on this page · September 2026
From the sources
🌙 A really tiny WebAssembly compiler for demonstration and educational purposes. Written in Go and built as one of my quests to conquer the WebAssembly dungeon - thomscoder/luna
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Hello, I'm building a WebAssembly compiler and documenting the process in the meantime. This aims to be a tool for demonstration and education purpose. It doesn't aim to do fancy stuff nor to replace existing ones. I'm building this to learn and to improve and hopefully it can be useful for others as well :) From last time I've presented the idea, I've implemented more basic features on Luna and I've built a custom and tiny runtime for Luna! (documenting it of course). Any feedback is really appreciated :) Repo: https://github.com/thomscoder/luna
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