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DataToolings

Free Online TOML Parser & Validator

Parse, validate, and convert TOML to JSON online. Instantly check TOML syntax and view the parsed structure. Free, browser-based TOML parser tool.

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What is TOML Parser?

TOML Parser is a free online tool that validates and converts TOML (Tom's Obvious, Minimal Language) to JSON. TOML is a configuration file format used by Rust's Cargo.toml, Python's pyproject.toml, and many other tools. Paste your TOML and instantly see the parsed JSON structure.

How to Use TOML Parser

  1. Paste your TOML content into the input area
  2. Click "Parse TOML" to validate and convert
  3. View the parsed JSON output on the right
  4. Copy the JSON result with the copy button

Features

  • Full TOML v1.0 spec support via smol-toml
  • Clear error messages for invalid TOML syntax
  • Converts TOML to formatted JSON output
  • 100% browser-based — your config files never leave your device

FAQ

What is TOML used for?

TOML is commonly used for configuration files. Examples include Rust's Cargo.toml (package manifest), Python's pyproject.toml, Hugo's config.toml, and many other developer tools that prefer a human-readable config format.

What TOML version is supported?

The tool uses smol-toml which supports TOML v1.0, the current stable specification. This includes all data types: strings, integers, floats, booleans, datetime, arrays, and inline tables.

Can I convert JSON back to TOML?

This tool currently converts TOML to JSON. For JSON to TOML conversion, you can use the JSON to YAML tool as an intermediate step, or use a dedicated conversion library in your project.