There are a good number of code formatters under the sun. I've been wanting to build https://areweformattingyet.com for a while now, I figure it's worth starting here with a simple list of everything that's around. Let me know via bsky if I need to add something!
Relatedly, I want to try to set up fuzzing for all said formatters, since they're a pretty solid problem space for fuzzing, idempotent and well-scoped. See Checking for idempotency: a bodgey formatter fuzzer, and jasikpark/fuzz-prettier for more.
| Language | Tools |
|---|---|
| TS / TSX / JS / JSX | |
| Rust | |
| Go | |
| Go Template | |
| Java | |
| C / C++ | |
| Zig | |
| Gleam | |
| Handlebars | |
| Markdown / MDX | |
| Markdoc | |
| Bash |
McYoung wrote a great post about an approach to formatters from first principles that makes me want to try my hand: https://mcyoung.xyz/2025/03/11/formatters/#fnref:80-cols