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TOML to JSON Converter

Convert TOML to JSON or JSON to TOML instantly. Supports [sections], key-value pairs, strings, integers, floats, booleans, and arrays. Useful for Cargo.toml, pyproject.toml, and any TOML config file. Everything runs in your browser.

✓ TOML → JSON and JSON → TOML ✓ [sections] → nested objects ✓ Type-safe conversion ✓ Runs 100% in your browser
JSON Output

TOML → JSON Type Mapping

Type TOML JSON
Stringname = "hello""name": "hello"
Integercount = 42"count": 42
Floatpi = 3.14"pi": 3.14
Booleandebug = true"debug": true
Arraytags = ["a", "b"]"tags": ["a", "b"]
Section[database]
host = "localhost"		"database": {
  "host": "localhost"
}

Frequently Asked Questions

What is TOML and why convert it to JSON?▼

TOML (Tom's Obvious, Minimal Language) is a config file format used by Rust (Cargo.toml), Python (pyproject.toml), and Hugo. JSON is the standard for APIs and web services. Converting between them is a common task when bridging tooling ecosystems or reading config data programmatically.

Can I convert JSON back to TOML?▼

Yes. Click 'JSON → TOML' to switch direction. Paste your JSON object and get clean TOML output with proper sections for nested objects and correct value types.

What TOML features are supported?▼

The converter supports [section] headers (mapped to nested JSON objects), key = value pairs, strings (double and single quoted), integers, floats, booleans (true/false), and inline arrays. Multi-line strings and inline tables have limited support.

Is my data sent to any server?▼

No. All conversion runs entirely in your browser using JavaScript. Your TOML or JSON data never leaves your machine — safe for sensitive config files, API keys, and secrets.

What projects use TOML?▼

TOML is the standard config format for Rust (Cargo.toml), Python packaging (pyproject.toml), the Hugo static site generator, Gitea, and many modern CLI tools. If you work in Rust or Python, you likely encounter TOML daily.

How is the TOML to JSON converter different from the original tool?▼

This URL (/tools/toml-to-json-converter) is a canonical alias for the same tool available at /tools/toml-to-json. It provides identical bidirectional TOML ↔ JSON conversion with the same feature set, running 100% in your browser.

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