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TOML ↔ JSON Converter

Convert between TOML and JSON formats instantly. Supports tables, arrays, inline tables, and all TOML data types.

TOML
JSON
💡 Definition

TOML & JSON

  • TOML (Tom's Obvious, Minimal Language) is a configuration file format designed to be easy to read.
  • JSON (JavaScript Object Notation) is the most common data interchange format.
  • This tool converts between them for config file migration or inspection.
📖 How to use

Step by Step

  • Paste TOML config in the left panel
  • JSON equivalent appears on the right
  • Paste JSON on the right to convert to TOML
  • Supports nested tables, arrays, and all TOML types
🎯 Use cases

When to use

  • Converting config files between formats
  • Inspecting TOML config as JSON
  • Migrating from TOML to JSON or vice versa
  • Working with Cargo.toml, pyproject.toml, etc.

Frequently Asked Questions

What TOML features are supported?▾
This tool supports: basic strings, integers, floats, booleans, datetimes, arrays, inline tables, standard tables [table], and array of tables [[table]].
Can I convert Cargo.toml?▾
Yes. Paste any Cargo.toml and get the JSON equivalent. Note that TOML preserves more semantic meaning (like datetime types) that JSON stores as plain strings.

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