Format & Validate TOML Online Free
TOML is the configuration format of choice for Rust projects, Hugo static sites, Python packaging with pyproject.toml, and many modern developer tools. Keeping TOML files well-formatted and valid is important because syntax errors in configuration files cause hard-to-diagnose tool failures. This tool formats any TOML document with consistent spacing and alignment, and validates the syntax against the TOML specification. Paste your TOML and get clean formatted output or a precise error message indicating the problem line. All formatting runs client-side in your browser with no data transmission.
toml input
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formatted tomlREADY
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FAQ
- Which TOML version is supported?
- The formatter supports TOML v1.0, the current stable specification used by Cargo.toml, pyproject.toml, and Hugo config files.
- Does it validate TOML types?
- Yes. The parser validates string, integer, float, boolean, datetime, array, and table types according to the TOML specification.
- Can I use this for Cargo.toml or pyproject.toml?
- Yes. Those files use standard TOML and will be formatted and validated correctly.