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TOML to JSON Converter

Convert TOML into JSON in your browser, with the structure preserved and parse errors explained in plain language.

Processed in your browser

Your result will appear here as soon as you add some input.

How to use it

  1. 1Paste your document into the input box, or type it directly.
  2. 2Adjust the options if you need something other than the defaults.
  3. 3The result updates as you type.
  4. 4Copy the result to your clipboard or download it as a file.

Example

Input

name = "Ada"
active = true

[settings]
retries = 3

Output

Valid JSON with the same structure

About the TOML to JSON Converter

TOML is designed to be obvious to read and unambiguous to parse: typed values, real dates, and comments. It is what Rust, Python packaging and many Go tools use for configuration.

JSON is the default interchange format of the web: every language parses it, it has exactly six types, and there is only one way to write a given document.

The document is parsed into a common structure and written back out as JSON, so the result is always syntactically correct even when the input was formatted unusually. It has no comments, no date type and no trailing commas, and numbers are IEEE-754 doubles - so an integer above 2^53 loses precision.

Questions people ask

Is your document uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your document never leaves your device. You can confirm it by opening your browser's network panel while the tool runs, or by disconnecting from the internet after the page has loaded.

Is it free, and do I need an account?

Yes, it is free, and there is no account, no sign-up and no watermark on the result. The project is funded by optional donations.