Convert JSON data to TOML format for configuration files.
Copy your JSON data and paste it into the input area.
Select JSON to TOML or TOML to JSON using the direction toggle.
Click Convert, then copy the output for use in your configuration files.
Drop a file here or click to browse
Ctrl+Enter to convert
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JSON to TOML Converter is a free online tool that helps you convert json data to toml format for configuration files. With Bidirectional: convert json to toml and toml back to json. Nested Support: handles deeply nested objects, arrays, and mixed types correctly, the tool makes json tasks straightforward and efficient. Every operation runs locally in your browser — your data stays private and never leaves your device.
JSON to TOML Converter processes everything on your device, eliminating the need for server uploads or software installation. This approach is particularly useful for converting json configuration to toml for rust cargo or python pyproject.toml migrating application configs between json and toml formats. Whether you need bidirectional or more advanced json operations, JSON to TOML Converter delivers reliable results without compromising on security or performance.
TOML is a configuration file format designed for human readability. It is commonly used in projects like Rust's Cargo, Python's pyproject.toml, and Hugo static sites.
Yes. The converter works bidirectionally  paste TOML to get JSON or paste JSON to get TOML using the direction toggle.
Yes. Deeply nested JSON objects are converted to TOML table sections (like [section.subsection]) correctly.
No. All conversion happens locally in your browser.
Convert JSON to TOML and TOML back to JSON.
Handles deeply nested objects, arrays, and mixed types correctly.
Preserves strings, numbers, booleans, dates, and arrays with proper TOML typing.
All conversion happens in your browser  nothing is uploaded.
JSON to TOML Converter is useful in a variety of scenarios across different workflows:
Converting JSON configuration to TOML for Rust Cargo or Python pyproject.toml
Migrating application configs between JSON and TOML formats
Preparing TOML-based configuration for Hugo static sites from JSON data
Nested JSON objects become TOML table headers like [table.subtable]. Arrays of tables use [[array]] syntax.
TOML has explicit date and time types that JSON lacks. Date strings in JSON are preserved as strings in TOML.
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