TOML Validator, Formatter & Converter

Validate, format, and convert TOML to JSON, YAML, XML, or INI. Built for Cargo.toml, pyproject.toml, and config files

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Frequently Asked Questions

What is TOML?

TOML (Tom's Obvious Minimal Language) is a configuration file format that's easy to read and write. It's used by Rust (Cargo.toml), Python (pyproject.toml), and many other tools.

How is TOML different from YAML?

TOML is more explicit and less error-prone than YAML. It doesn't rely on indentation for structure, uses clear section headers like [section], and has stricter typing. Compare with our YAML Validator.

What are common TOML use cases?

TOML is popular for Cargo.toml (Rust packages), pyproject.toml (Python projects), Hugo config, and general application configuration where clarity is important. For even simpler key-value configuration, see the classic INI format.

Is my data secure?

Yes, all validation happens locally in your browser. Your configuration files never leave your device.

JSON

Validate, format & convert JSON

YAML

Validate, format & convert YAML

INI

Validate & convert INI

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TOML Validator, Formatter & Converter

Frequently Asked Questions

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JSON

YAML

INI

Diff

Frequently Asked Questions