TOML to JSON Converter

Parse TOML documents and convert to formatted JSON output with validation and error reporting.

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1. Paste your TOML configuration content into the input area on the left side. 2. The parser validates TOML syntax and reports any errors such as duplicate keys or malformed values. 3. Review the converted JSON output with proper indentation and type mapping in the right panel. 4. Verify that TOML tables, arrays of tables, and datetime values are correctly represented in JSON. 5. Click the copy button to copy the formatted JSON for programmatic processing or API consumption.

About This Tool

The TOML to JSON Converter parses your TOML configuration files and produces formatted, valid JSON output. This is particularly useful when you need to programmatically process TOML configs, feed configuration data into JSON-based APIs, or migrate between configuration formats.

TOML has a rich type system including datetime values, integers, floats, multiline strings, and literal strings. This converter maps each TOML type to its closest JSON equivalent, preserving the data structure and hierarchy. Tables become JSON objects, arrays of tables become JSON arrays of objects, and inline tables are handled correctly.

The parser validates your TOML input and provides clear error messages for syntax issues such as duplicate keys, invalid table headers, or malformed values. The JSON output is formatted with consistent indentation for easy readability.

Frequently Asked Questions

TOML datetime values are converted to ISO 8601 string format in JSON, since JSON does not have a native datetime type. For example, a TOML datetime 2024-01-15T10:30:00Z becomes the JSON string "2024-01-15T10:30:00Z".
TOML comments (lines starting with #) are discarded during conversion because JSON does not support comments. All data values and structure are preserved.
Yes. TOML arrays of tables (defined with [[double.brackets]]) are correctly converted to JSON arrays of objects, preserving the order and structure of each table entry.
Yes. Both inline tables like {key = "value"} and dotted keys like parent.child = "value" are parsed correctly and represented as nested JSON objects in the output.

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