JSON to YAML Converter

Convert any JSON document into clean, indented YAML — the format used by Kubernetes manifests, Docker Compose files, GitHub Actions and most modern config systems.

json-to-yaml · runs locally

What this JSON to YAML converter does

Modern infrastructure speaks YAML: Kubernetes manifests, Docker Compose, GitHub Actions workflows, Ansible playbooks and countless app configs. But data often arrives as JSON — from an API, an export, or a generator. This converter translates JSON into idiomatic YAML: two-space indentation, quotes only where the YAML spec requires them, block-style lists, and key order preserved.

Everything runs in your browser. Configuration files frequently contain connection strings and internal hostnames, so not uploading them anywhere is a feature, not a footnote.

How to convert JSON to YAML

  1. Paste your JSON document into the input box.
  2. Click Convert to YAML — invalid JSON shows the parser error instead.
  3. Copy the YAML into your manifest, workflow or config file.

JSON vs YAML in practice

The formats represent the same data model — objects, arrays, strings, numbers, booleans and null — so conversion is lossless in this direction. YAML adds human conveniences JSON deliberately omits: comments, unquoted strings and indentation-based structure. A common workflow is to keep machine-generated data in JSON and hand-maintained configuration in YAML, converting at the boundary. For a fuller comparison of when each format fits, see the guide on JSON vs XML vs YAML.

Frequently asked questions

Is YAML a superset of JSON?

Yes — YAML 1.2 parses any valid JSON document, so technically your JSON already is YAML. Converting is still useful because idiomatic YAML (indentation instead of braces, no quotes where optional) is far more readable, which is the point of using YAML for configuration.

Why are some strings quoted in the output and others not?

YAML only requires quotes when a bare string would be ambiguous — values like 'true', 'null', text starting with a digit, or strings containing special characters like colons. The converter quotes exactly those cases and leaves everything else clean.

What indentation does the YAML output use?

Two spaces per level, the convention used by Kubernetes, Docker Compose, GitHub Actions and virtually all YAML tooling. YAML forbids tabs for indentation, so spaces are the only correct choice.

Does the converter preserve key order?

Yes. Keys appear in the YAML output in the same order they appear in your JSON, which keeps related settings grouped the way you organized them.

JSON Formatter

Beautify and pretty-print JSON with 2-space, 4-space, or tab indentation.

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JSON to XML Converter

Convert JSON into well-formed, indented XML markup.

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JSON Validator

Check JSON syntax and get the exact line and column of any error.

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