tomt - a TOML formatter

tomt is a dead simple TOML formatter that uses taplo under the hood.

It provides both a library and CLI that perform roughly the same functionality.

Installation

# cargo install tomt

Usage

tomt by default will attempt to find a .tomlfmt.toml file in the current and ancestor directories. If found, it will run formatting starting in this directory.

Otherwise, without extra CLI parameters, it will run within the current directory.

When it runs, it will glob the filesystem recursively for all .toml files, ignoring any that are .gitignore'd.

tomt exits non-zero only on I/O errors; TOML syntax errors are silently ignored and retained. tomt is not a TOML linter, just a formatter.

Passing -c/--check causes tomt to exit non-zero if formatting would caused a change in the file contents. This can be used for CI/CD steps, etc.

License

Copyright © 2026 by Josh Junon and released under the MIT or the Apache-2.0 licenses, at your discretion.

Part of the Oro Operating System project.