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TOML to JSON Converter - Convert JSON to TOML Online Free

Free TOML to JSON converter and JSON to TOML converter. Parse TOML configuration files to JSON format instantly in your browser. No data sent to servers.

About TOML and JSON Conversion

TOML (Tom's Obvious Minimal Language) is a popular configuration file format used by Rust (Cargo.toml), Python (pyproject.toml), Hugo, and many developer tools. This free online TOML to JSON converter parses TOML files into structured JSON and converts JSON back to TOML format. All processing runs entirely in your browser for maximum privacy and speed.

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How to Use

  1. Paste TOML in the left panel or JSON in the right panel
  2. Click 'TOML → JSON' or 'JSON → TOML' to convert
  3. Copy the converted output using the copy button
  4. Use 'Load Sample' to try with example TOML configuration

Common Use Cases

  • Converting Cargo.toml (Rust) configurations to JSON for programmatic access
  • Parsing pyproject.toml (Python) to JSON for CI/CD pipelines
  • Migrating configuration files between TOML and JSON formats
  • Validating TOML syntax by converting to structured JSON

Frequently Asked Questions

What is TOML?
TOML (Tom's Obvious Minimal Language) is a configuration file format designed to be easy to read. It's used by Rust (Cargo.toml), Python (pyproject.toml), and many other tools.
Is TOML better than JSON for config files?
TOML is more human-readable with support for comments and cleaner syntax for nested structures. JSON is better for data interchange and API responses.
Does this tool handle nested TOML tables?
Yes. The converter supports sections [section], dotted keys, arrays, strings, numbers, and booleans.
Is my data safe?
All conversion happens in your browser. No data is sent to any server.
What TOML features are supported?
Basic key-value pairs, sections (tables), arrays, strings (basic and literal), integers, floats, and booleans are supported.