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JSON to TOML

Convert a JSON object into valid TOML configuration with tables and arrays of tables.

Convert JSON to TOML

Top level keys: — · Status: —
Conversion runs locally in your browser. Objects become tables, arrays of objects become arrays of tables and dates stay quoted strings.

How to use the JSON to TOML

  1. Paste a JSON object into the input box.
  2. Press Convert to TOML to build the configuration.
  3. Copy the TOML output with the Copy TOML button.

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Frequently Asked Questions

Common questions about the free online json to toml.

Paste a JSON object into the input box and press Convert to TOML. The TOML document appears instantly in the output box.
Tables, arrays of tables, dotted and quoted keys, inline tables, inline arrays, strings, integers, floats and booleans.
Dates in the JSON input are plain strings, so they are written as quoted TOML strings. Treat them as text in your own code.
No. A TOML document is a set of tables, so the top level of the JSON input must be an object.
Each nested object becomes its own table header, and deeper objects use dotted headers such as owner.address.
Yes. An array whose items are all objects becomes a TOML array of tables using double brackets around the table name.
No. The conversion runs entirely in your browser and your JSON never leaves your device.
Invalid JSON, an Infinity or NaN number and an object inside an inline array stop it. Null values are skipped.
Yes. Passing the TOML output through the TOML to JSON tool gives the same data back for the supported subset.
Yes. It is completely free, works in any modern browser and needs no account or sign up.

Last updated: October 10, 2026