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JSON to TOML

Convert JSON objects to TOML configuration format instantly

Free online JSON to TOML converter. Paste a JSON object and get a valid TOML config file. Root value must be a JSON object. No data sends to server.

TOML output will appear here

About JSON to TOML

TOML (Tom's Obvious Minimal Language) is a configuration file format widely used in Rust (Cargo.toml), Python (pyproject.toml), Hugo, and many other projects. It maps naturally to a hash table and is designed to be unambiguous.

Conversion Rules

  • JSON objects become TOML tables ([section])
  • JSON arrays of objects become TOML array-of-tables ([[section]])
  • JSON arrays of primitives become TOML inline arrays
  • JSON null is represented as an empty string (TOML has no null)

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