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JSON Studio
Convert JSON into clean block-style YAML with live preview, copy, and download — entirely in-browser.
100% in-browser · nothing leaves your deviceLoading editor…
Output initialises when this pane is visible.
Everything you need to know, one click away.
- item).|) for readability.Everything this converter can do — all processed locally in your browser.
The YAML output updates as you type. No need to click a button every time — just paste your JSON and the result is right there.
Output uses block-style mappings and sequences with consistent indentation. Strings are only quoted when the YAML spec requires it — no clutter.
Open a .json file from your computer, drag and drop it onto the editor, or fetch JSON directly from any CORS-enabled URL.
Grab the YAML output to your clipboard with one click, or download it as a .yaml file — ready to use in any project.
All conversion happens entirely in your browser. Your JSON never leaves your device, and once loaded the tool works without any network connection.
Common questions about the JSON to YAML converter.
Yes, completely. Conversion runs entirely inside your browser using JavaScript. Your data is never sent to any server and never stored anywhere outside your own device. You can even disconnect from the internet after the page loads and it will still work.
The output uses block-style YAML 1.2 — the most readable format for humans. Objects become block mappings, arrays become block sequences (- item), and multi-line strings use literal block style (|). Strings are quoted only when required to avoid YAML parsing ambiguity.
Yes. Once the page has loaded and its assets are cached, all features work without a network connection. The only time the network is used is to load the editor on first visit, and optionally when you use "Load from URL".
All valid JSON is supported — objects, arrays, strings, numbers, booleans, and null. Deeply nested structures are fully handled. The converter maps every JSON type to its natural YAML equivalent.
This tool converts in one direction only: JSON → YAML. For a two-way converter, try the JSON ↔ TOON converter or the full JSON Editor Pro which includes a Transform mode.