TOML Formatter & Validator

Parse and reformat TOML content with consistent formatting — parsing also validates the syntax.

Your file is processed locally in your browser and is not uploaded to our server.

Input TOML

Formatted TOML

Your result will appear here.

How to use TOML Formatter & Validator

1Paste TOML content.
2It is parsed and re-serialized with consistent formatting — parsing also validates the syntax, with the error shown if invalid.
3Copy the formatted result.

Frequently asked questions

TOML is a configuration file format used by tools like Cargo (Rust), Poetry (Python) and many modern CLI apps, valued for being easy for humans to read and write.