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TOOL · 62 · Convert

JSON ⇄ YAML Converter

Convert JSON to YAML or YAML back to JSON — pretty output, in-browser, with error location.

In short
JSON ⇄ YAML Converter parses JSON or YAML in your browser and outputs the other format with proper indentation and quoting — no signup, no upload.

Processed 100% in your browser — your files never leave your device.

How it works

  1. Step · 01

    Paste JSON or YAML into the input box.

  2. Step · 02

    Pick a direction — JSON→YAML or YAML→JSON — then press Convert.

  3. Step · 03

    Copy the result or download it. All parsing runs locally in your browser.

Frequently asked questions

Which YAML version does it support?
YAML 1.2 via js-yaml, the same library used by many editors and CI tools.
Will comments in YAML be preserved?
No — YAML → JSON → YAML round-trips drop comments because JSON has no comment syntax.
Are my files uploaded to a server?
No. Files are processed directly in your browser using JavaScript and WebAssembly. Nothing is uploaded to our servers, so your documents never leave your device.
Does it work on mobile?
Yes. The tools run in any modern browser on desktop, tablet, or mobile (Chrome, Edge, Safari, Firefox). Very large files may be slower on low-end phones.

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