Convert JSON to TOML Online
Simplify your configuration by converting JSON objects to the more readable TOML format. Our tool ensures proper formatting of tables, arrays, and key-value pairs, making integration with TOML-based systems easy.
Convert JSON to TOML Online
Transform JSON objects into TOML configuration format with proper structure and formatting.
TOML output will appear here
How the JSON to TOML Converter Works
This tool transforms JSON objects into TOML configuration format. It recursively processes JSON structures, converting objects to tables, arrays to TOML arrays, and preserving all data types. The output is human-readable TOML with proper formatting.
Conversion Process
- Paste your JSON content into the input area
- Click "Convert to TOML" to process
- JSON objects become TOML tables [table]
- Arrays of objects become [[array_of_tables]]
- Simple arrays become inline arrays [1, 2, 3]
- Data types are preserved (strings, numbers, booleans)
- Copy or download the generated TOML
Specific Use Cases
Rust Project Configuration
A Rust developer converts package.json to Cargo.toml format. TOML is the native format for Rust project configuration.
Static Site Configuration
A developer migrates from JSON config to TOML for Hugo or Zola. TOML provides better readability for site configuration.
API Response to Config
Someone saves API responses as configuration files. Converting JSON to TOML makes configs more maintainable.
Build Tool Migration
A team switches from JSON-based build config to TOML. TOML's comment support improves configuration documentation.
Data Export for Version Control
Exported JSON data converts to TOML for Git storage. TOML diffs are more readable in pull requests.
What to Know Before Using This Tool
Understanding JSON to TOML conversion:
- JSON objects become TOML tables with [name] syntax
- Arrays of objects become [[array]] tables
- Simple arrays become inline [value, value] format
- All JSON types map to equivalent TOML types
- Null values become TOML null
- Nested structures are fully preserved
Frequently Asked Questions
How are nested objects handled?
Nested JSON objects become dotted TOML tables.{"a": {"b": 1}} becomes [a] b = 1.
What about arrays of objects?
Arrays containing objects become TOML array of tables [[name]]. Each object in the array becomes a separate table entry.
Are JSON comments preserved?
Standard JSON doesn't support comments. If your JSON has comments, remove them before conversion. TOML supports # comments.
How are dates handled?
ISO 8601 date strings are recognized and preserved as TOML dates. Other strings remain as quoted strings.
Can I convert back to JSON?
Yes, use the TOML to JSON converter. The conversion is lossless for standard data types.
What about invalid JSON?
The tool validates JSON before conversion. If your JSON is invalid, fix syntax errors (missing commas, quotes) before converting.
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