What Is a TOML to JSON Converter?
A TOML to JSON converter transforms configuration files written in TOML (Tom’s Obvious Minimal Language) into JSON format. TOML is popular for application configuration files (such as Cargo.toml in Rust or pyproject.toml in Python), while JSON is the standard data interchange format for APIs and web services. This tool bridges the two formats instantly.
How to Use This TOML to JSON Converter
- Paste your TOML content into the input area.
- Click “Convert” to convert the TOML to JSON.
- Copy the JSON result for use in your application, API request, or configuration pipeline.
Key Concepts
TOML supports native data types including strings, integers, floats, booleans, dates, arrays, and tables (equivalent to JSON objects). Unlike JSON, TOML allows comments and is designed to be easy to read and write by humans. When converting to JSON, TOML tables become nested objects, TOML arrays become JSON arrays, and TOML datetime values are serialized as ISO 8601 strings.
Frequently Asked Questions
Are TOML comments preserved in JSON output?
No. JSON does not support comments, so any TOML comments (lines starting with #) are stripped during conversion. If you need to preserve documentation, consider keeping the original TOML file alongside the generated JSON.
How are TOML datetime values handled?
TOML has native datetime, date, and time types. When converted to JSON, these become ISO 8601 formatted strings (e.g., “2024-01-15T09:30:00Z”), since JSON has no built-in date type.
Can I convert JSON back to TOML?
While the reverse conversion is possible, some information may be lost because TOML supports features like inline tables and multi-line strings that have no direct JSON counterpart. Use a dedicated JSON-to-TOML tool for the reverse direction.