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TOML →JSON Converter

Convert between TOML and JSON format. Supports tables, arrays of tables, inline tables, multi-line strings, and dates. Everything runs in your browser — no server, no tracking.

Converter Tools Runs locally No data sent
toml json convert client-side only
JSON indent:
TOML Input
0 chars
→
JSON Output
0 chars
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TOML (Tom's Obvious Minimal Language) is a config file format used by Cargo, uv, pyproject.toml, and many CLI tools. Use this converter to inspect TOML configs as JSON or generate TOML from a JSON object. Note: TOML dates are preserved as ISO strings in JSON output.

What is TOML to JSON Converter?

TOML to JSON Converter helps you move structured configuration data between TOML and JSON formats. It is useful for developer tooling, app settings, package metadata, and any workflow where one system prefers TOML while another expects JSON.

How to Use TOML to JSON Converter

  1. Paste TOML or JSON into the input panel.
  2. Choose the conversion direction you need.
  3. Review the converted result and fix syntax issues if the parser reports an error.
  4. Copy the output into your config file, script, or build workflow.

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Understand TOML to JSON Converter ▾
Example
Input [database] server = "db.example.com" ports = [5432, 5433]
Output { "database": { "server": "db.example.com", "ports": [5432, 5433] } }
Common Use Cases
  • Convert app, Rust, or Python config files between TOML and JSON
  • Inspect nested TOML tables in explicit JSON object form
  • Prepare data for tools that accept JSON but not TOML
  • Check arrays of tables, inline tables, and typed values during config debugging
Why Use This Tool
  • Useful for config-heavy projects and language ecosystems that rely on TOML.
  • Makes TOML tables and typed values easier to inspect in JSON form.
  • Runs locally so project configuration stays on your machine.
Frequently Asked Questions
Are TOML comments preserved when converting to JSON?

No. JSON does not support comments, so TOML comments are dropped during conversion to JSON.

Does the tool support TOML arrays of tables?

Yes. TOML arrays of tables (double-bracket sections like [[products]]) are converted to JSON arrays of objects.

What TOML version is supported?

The tool supports TOML v1.0, which covers all standard features including dotted keys, inline tables, and multi-line strings.

Is my configuration data safe?

Yes. All processing happens entirely in your browser using JavaScript. No data is ever sent to a server.