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JSON Toolbox- Free online JSON tools

JSON to YAML

Convert JSON to YAML online with clean, readable, correctly indented output. Handles nested objects and arrays.

  • 100% client-side, nothing uploaded
  • Instant results
  • Works offline once loaded
Input JSON

Empty

YAML output

Empty

How it works

About this tool

This JSON to YAML converter transforms JSON into human-friendly YAML. Objects become mappings, arrays become sequences, and everything is indented with two spaces for a clean, diff-friendly result.

It is ideal for turning API responses or config snippets into YAML for Kubernetes manifests, CI pipelines, Docker Compose, or application configuration. Strings that need quoting are quoted automatically so the output is always valid YAML.

The conversion runs entirely in your browser using a standards-compliant YAML engine, so your data stays private and results appear instantly.

JSON Toolbox processes all data locally in the browser. Nothing is uploaded to a server.

Common questions

Frequently asked questions

How do I convert JSON to YAML?
Paste your JSON into the input editor and the YAML equivalent appears instantly on the right, ready to copy or download.
Does it preserve data types?
Yes. Numbers, booleans, null, strings, objects, and arrays all map to their correct YAML representations, and ambiguous strings are quoted so they are not misread as other types.
Is the output valid YAML 1.2?
Yes. The converter uses a compliant YAML serializer, so the result parses cleanly in any modern YAML tool or library.
Is my JSON uploaded during conversion?
No. Conversion is fully client-side. Your document never leaves the browser.

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