Rewrite JSON data as TOML

Developers and operations teams choose JSON to TOML when moving configuration or structured data between tools.

Rewrite JSON data as TOML, then reuse a structured result that is easy to review. Use it for free in your browser, with no account required.

How to use

Insert a JSON object into the input area or import a .json, .toml, .ini, .env, .jsonl, .ndjson, .sql or .txt file.
Click Convert to rewrite the data in TOML format.
The result shows TOML sections with key = value pairs.
Check the resulting structure, especially arrays and nested objects.
Copy the generated TOML or clear the fields with Erase.

Example

You want to migrate a JSON configuration to TOML, which is more readable for your team. The tool turns the object into sections and clear lines. You get a TOML file ready to be reviewed and versioned.

Limits and formats

Arrays of tables may be rendered in a specific way; check the TOML syntax you get.
Null or unsupported values in TOML can be problematic.
The tool does not verify final TOML validity across different versions.
JSON comments are not carried over to the output.

Where processing happens

The conversion runs entirely in your browser, with no external transmission. Your configuration data does not leave your computer during the operation.

Frequently asked questions

How are arrays represented in TOML?

Simple arrays become lists in brackets. Arrays of objects are often converted into arrays of tables, with a specific syntax. Review the result carefully to make sure it matches what you expect.

Can I convert JSON containing null values?

TOML does not have a standard null value. The tool may omit these keys or convert them to an empty string. Check the output and adjust manually if your project requires special handling.

Does the generated TOML follow the official specification?

The tool produces common TOML syntax, but it does not state a specific version. For critical use, test the file with a recognized TOML parser and fix any differences.