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TOML ↔ JSON

DevTools TOML ↔ JSON converts bidirectionally between TOML and JSON locally in your browser—suited for Python, Rust, and configuration workflows.

TOML ↔ JSON

Convert bidirectionally between TOML and JSON—suited for Python, Rust, and configuration workflows.

JSON output
{
  "title": "DevTools",
  "site": {
    "name": "Converters",
    "features": [
      "toml",
      "json"
    ]
  }
}

About this tool

TOML appears in pyproject.toml, Cargo.toml, and similar files. Switch formats quickly while preserving objects, arrays, and scalar values.

How to use

  1. Choose TOML → JSON or JSON → TOML.
  2. Paste source text.
  3. Review converted output or parse errors.

FAQ

Which format is better for config files?

JSON suits programmatic exchange; TOML is more human-readable and comment-friendly for hand-edited configs.

Are arrays and nested tables supported in TOML → JSON?

Yes. Arrays, tables, and nested structures map to JSON objects and arrays.

Why might JSON → TOML fail?

TOML favors object-shaped roots. Top-level non-objects or shapes TOML cannot express may error or produce limited output.

Is conversion local?

Yes. All parsing and serialization run in your browser.

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