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TOML to JSON Converter Runs in your browser. No input data is sent to our server.

Paste TOML into the editor, convert it instantly, and copy or download the JSON result. This page is useful for app configuration, static site settings, developer tooling, package metadata, and structured data workflows.

JSON output

Paste content and convert it instantly.

This converter runs in your browser so you can reshape structured text, config data, and encoded values without sending working content to a remote processing service.

Convert TOML to JSON Online

Convert TOML to JSON online for config files, developer tooling, app settings, build pipelines, and structured data workflows.

How to use TOML to JSON Converter

1

Paste content into the toml input panel.

2

Run the converter to generate the target format instantly.

3

Copy or download the result once it looks right.

What this tool helps you do

Paste, convert, and copy results quickly

Useful for APIs, configuration files, and structured text

Sample input is built in for quick testing

Download the converted output as a file

Why this helps in text and data workflows

Converting a Rust Cargo.toml or Python pyproject.toml file into JSON to inspect or process its structure programmatically.

Translating a TOML config file into JSON so it can be consumed by a tool or API that only accepts JSON input.

Reading a Hugo or Zola static site config written in TOML by converting it to JSON for easier debugging.

Extracting structured data from a TOML package manifest to feed into a build script or automation workflow.

Common problems and fixes

The TOML has a datetime value that isn't converting correctly.

TOML supports native date and time types. The converter outputs them as ISO 8601 strings in JSON. If the receiving system expects a different format, you will need to reformat the string after conversion.

Nested TOML tables look wrong in the JSON output.

TOML tables like [server.options] map to nested JSON objects. Check that the nesting depth matches what you expected — deep TOML table hierarchies can produce unexpected nesting levels in JSON.

The converter returns a syntax error for my TOML.

TOML is strict about formatting. Common issues include duplicate keys, incorrect inline table syntax, and missing quotes around string values that contain special characters. Check the reported error line first.

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Frequently asked questions

How do I convert TOML to JSON?

Paste your TOML into the input box, run the converter, and copy or download the formatted JSON output.

Does this TOML to JSON converter format the JSON result?

Yes. The output is returned as readable formatted JSON so it is easier to inspect and reuse.

Is this TOML to JSON converter free?

Yes. It is free to use in your browser.

What is TOML used for?

TOML is a configuration file format designed to be easy to read. It is commonly used in Rust projects (Cargo.toml), Python packaging (pyproject.toml), and static site generators like Hugo.

Does TOML support the same data types as JSON?

TOML supports strings, integers, floats, booleans, arrays, and tables (objects), like JSON. It also adds native date and time types that JSON does not have natively.

Can I convert back from JSON to TOML?

Yes. Use the JSON to TOML converter to go in the other direction.