TOML ⇄ JSON Converter

The TOML ↔ JSON Converter is a bidirectional format translation tool that converts between Tom's Obvious Minimal Language (TOML) configuration files and JSON data. It's essential for Rust, Python, and Go developers who work with Cargo.toml, pyproject.toml, and other TOML-based configuration files but need to interoperate with JSON-based tools, APIs, and data pipelines.

TOML's strengths — explicit type declarations, date/time support, dotted key notation, and table arrays — map naturally to JSON structures, and this converter handles all mappings correctly: TOML tables become JSON objects, arrays become arrays, dates become ISO 8601 strings, and dotted keys are expanded into nested objects. The reverse direction ensures that JSON data is formatted as clean, idiomatic TOML with proper section headers and type-appropriate values.

For developers migrating configuration systems, integrating TOML configs with JSON APIs, or building tooling that needs to read TOML files programmatically through a JSON intermediate format, this converter provides instant, accurate translation. All processing is client-side — your configuration files and their contents never leave your browser.