Validate TOML before converting to JSON

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

Validate TOML before converting to JSON, then reuse a structured result that is easy to review. Use it in your browser with no account.

How to use

Paste or import your TOML configuration into the input area, checking that indentation and quotation marks are preserved.
Run the conversion to validate the TOML syntax and produce a readable JSON structure.
Review the JSON result for sections, arrays and converted values.
Copy the JSON into your configuration tool, script or documentation after a final check.

Example

A developer is moving a project configuration to an application that expects JSON. They paste the TOML file, run the conversion and check that the sections and values appear correctly in the result before replacing the old file.

Limits and formats

The converter does not fix invalid TOML; a syntax error must be corrected in the source file first, because the tool cannot guess the intended structure.
The JSON output may change the order of some keys or represent complex structures differently, so review the result before using it in production.
Some TOML-specific types may not have an obvious JSON equivalent, depending on how they are written in the original file.
The tool converts the content you provide; it does not verify that the values match what your application expects or that the configuration is complete.

Where processing happens

The conversion runs entirely in your browser. The TOML text you paste or import stays on your device and is not sent anywhere. This lets you convert a private configuration without transmitting it outside your machine.

Frequently asked questions

Can I convert a large TOML file?

Yes, as long as your browser can process the amount of text. For a very large file, split the configuration into parts or close unused tabs to keep the tool responsive.

Does the JSON output keep TOML comments?

No, JSON does not support comments. Annotations present in the TOML source are not carried over to the result, so keep the original file if you need them later.

What should I do if the conversion shows an error?

Fix the TOML syntax that was reported, then run the conversion again. Check quotation marks, brackets and section names in particular.