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YAML ⇄ JSON

Convert between YAML and JSON with validation.

Free, no uploads, no sign-up. Runs 100% in your browser.

How YAML ⇄ JSON works

YAML ⇄ JSON runs entirely in your browser. Convert between YAML and JSON with validation. Under the hood it uses js-yaml (a YAML parser and serializer). Your files are read into this tab’s memory, processed on your own CPU, and handed back to you as a download. Nothing is sent to a server.

How to use YAML ⇄ JSON

1. Open YAML ⇄ JSON and paste or type your input.
2. Results update instantly as you type.
3. Tweak options such as format, indentation or algorithm.
4. Copy the output or download it as a file.

Tips

• Everything is computed locally. Safe for tokens, keys and private data.
• Use Ctrl/⌘ + K to jump between developer tools quickly.

YAML ⇄ JSON FAQ

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

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