TOML (Tom's Obvious Minimal Language) is a configuration format known for readability. Used by Rust's Cargo.toml, Python's pyproject.toml, and Hugo. Transforms TOML to JSON and JSON to TOML, bridging configuration formats across ecosystems.
JSON output will appear here...Paste your TOML content into the input area and select TOML to JSON mode, or paste JSON and select JSON to TOML mode. The tool converts between the two formats with proper indentation. Syntax errors are highlighted with descriptive messages. Copy the output to your clipboard with one click.
TOML-to-JSON conversion is valuable when migrating configuration between tools that use different formats (e.g., converting Cargo.toml settings for a JavaScript build tool), programmatically processing TOML config files using JSON-based APIs and tools, converting pyproject.toml settings for use in CI/CD pipelines that expect JSON, debugging and validating TOML syntax by viewing the equivalent JSON structure, and generating TOML configuration from JSON-based UI forms or API responses in admin panels and dashboards.
TOML supports data types that map to JSON: strings, integers, floats, booleans, arrays, and tables (objects). The parser handles standard TOML features including sections ([table]), key-value pairs, inline comments, quoted strings, and nested tables. Conversion from JSON to TOML generates properly formatted section headers and key-value pairs.
TOML (Tom's Obvious Minimal Language) is a configuration file format designed to be easy to read and write. It is used by Rust's Cargo (Cargo.toml), Python's packaging (pyproject.toml), Hugo static site generator, and many other tools. TOML supports comments, tables, arrays, and typed values.
Yes, all valid TOML can be converted to JSON since TOML's data model is a subset of JSON's. The only consideration is that TOML's native datetime type is represented as an ISO 8601 string in JSON, and TOML's 64-bit integers may lose precision in JSON's 64-bit floating-point numbers for very large values.
TOML supports comments, has clearer syntax for nested structures, and is more human-friendly for editing. JSON is more widely supported by programming languages and APIs but lacks comments and can be verbose for deeply nested configurations. TOML is generally preferred for hand-edited config files, while JSON is better for machine-generated data.
Transform, format, generate, and encode data instantly. Private, fast, and always free.
Browse All Tools