JSON to TOML Converter
Convert JSON objects into TOML configuration syntax with optional recursive key sorting.
JSON to TOML Converter
TOML to JSON Converter
JSON to YAML Converter
JSON to JS Object Converter
JSON to Python Dict Converter
JSON to Go Struct Converter
Convert JSON objects into TOML configuration syntax with optional recursive key sorting.
About JSON to TOML Converter
Turn object-shaped JSON into TOML tables
The converter parses JSON with JSON.parse and serializes it with @iarna/toml. Nested objects become TOML tables, primitive arrays become TOML arrays, object arrays become array-of-tables, and date-looking JSON strings remain strings because JSON itself has no native date type.
Review nullable fields after conversion
TOML does not have a direct null value. Use this tool for JSON configuration objects that already map cleanly to TOML values, and review fields that were null in the source before committing the converted config.
FAQ
Common questions and answers about this topic.
What is the difference between JSON and TOML?
JSON uses curly braces and strict quoting rules, while TOML uses a flat key-value syntax with sections (tables). TOML supports comments, native date/time types, and is designed to be more human-readable for configuration files.
What are common use cases for TOML?
TOML is widely used for configuration files including Rust's Cargo.toml, Python's pyproject.toml, Hugo site config, and many CLI tools. Its readable syntax makes it ideal for settings that humans frequently edit.
Can I sort the keys alphabetically?
Yes, the sort keys dropdown allows you to alphabetically order all TOML table keys (A to Z) or retain the original sequence from your JSON. Sorting applies recursively across all nested TOML tables and sub-tables.
Is my data sent to any server?
No, the JSON-to-TOML conversion is performed entirely in your browser using JavaScript. Your JSON data stays on your device and is never uploaded to any server.