Topiary – uniform formatter for simple languages

Last Updated on February 20, 2026

Topiary aims to be a uniform formatter for simple languages, as part of the Tree-sitter ecosystem. It is named after the art of clipping or trimming trees into fantastic shapes.

Topiary is designed for formatter authors and formatter users. Authors can create a formatter for a language without having to write their own formatting engine or even their own parser. Users benefit from uniform code style and, potentially, the convenience of using a single formatter tool, across multiple languages over their codebases, each with comparable styles applied.

This is free and open source software.

Website: github.com/topiary/topiary
Support:
Developer: Tweag I/O Limited
License: MIT License

Topiary is written in Rust. Learn Rust with our recommended free books and free tutorials.

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