Are my JSON files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.

Is converting JSON to TOML free?

Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.

Does converting JSON to TOML lose quality?

No. TOML stores the same content without discarding anything, so the result is identical in quality to the original.

Do I need to install anything to open TOML files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the TOML afterwards needs whatever software normally handles Tom's Obvious Minimal Language on your device.

JSONtoTOML

Convert JSON to TOML

Up to 3 files at once, 100 with Pro. Mixed formats are fine.

You can convert JSON to TOML free and without an account: drop the file above and the TOML is ready to download in a second or two. The conversion happens inside your own browser, so the file is never uploaded — it works on Windows, Mac, Linux, iPhone and Android, and keeps working with the network switched off.

What JSON and TOML are for

The data format of the web. Nested structures, read by every programming language.

A configuration format that stays readable without YAML’s indentation traps.

How to convert JSON to TOML

Drop your JSON file onto this page, or click to pick one.
Choose TOML as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished TOML file.

JSON vs TOML: what changes

JSON compared with TOML
	JSON	TOML
Full name	JavaScript Object Notation	Tom's Obvious Minimal Language
File extension	.json	.toml
Media type	application/json	application/toml

Quality: Nothing is lost. The result holds exactly the same picture, text or data as the original.
Where it runs: This conversion runs inside your browser. Your file is never uploaded, and it works with the network disconnected.

JSON to TOML: common questions

Are my JSON files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.
Is converting JSON to TOML free?: Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.
Does converting JSON to TOML lose quality?: No. TOML stores the same content without discarding anything, so the result is identical in quality to the original.
Do I need to install anything to open TOML files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the TOML afterwards needs whatever software normally handles Tom's Obvious Minimal Language on your device.