JSON to TOML
Convert JSON objects to TOML format. Nested objects become TOML tables, arrays-of-objects become array tables.
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What Is JSON to TOML Converter?
JSON to TOML Converter transforms JSON objects into TOML (Tom's Obvious Minimal Language) format. TOML is the standard configuration format for Rust (Cargo.toml), Python (pyproject.toml), and many other modern tools. This converter handles nested objects as TOML tables and arrays-of-objects as TOML array tables.
How to Use
- Paste your JSON into the input area
- The TOML output appears instantly on the right
- Copy the result with the Copy button
Features
- Nested objects become TOML
[table]sections - Arrays of objects become
[[array-of-tables]] - Correct TOML types: strings, integers, floats, booleans
- Keys with special characters are automatically quoted
- Runs entirely in the browser
FAQ
How are JSON nulls handled?
TOML has no null type. JSON null values are converted to empty strings "".
What about JSON arrays of mixed types?
TOML arrays must be homogeneous in strict implementations. Mixed-type arrays are serialized as inline TOML arrays — check your TOML parser's tolerance for mixed types.
Can I convert back from TOML to JSON?
Use the TOML Parser tool on this site to parse TOML back to JSON.