JSON to YAML Converter Online — Free
Runs 100% in your browser — your files never leave your device.
Kubernetes manifests, CI pipelines, and Docker Compose files all want YAML, but the data often arrives as JSON. Paste JSON here — even the messy kind with comments or trailing commas — and get tidy YAML out. Conversion happens locally, so sensitive configs never leave your machine.
How it works
- 1
Paste your JSON
Comments and trailing commas are tolerated.
- 2
Read the YAML
The output updates live as you type.
- 3
Copy the result
One click copies the YAML for your manifest or pipeline.
About this tool
How the conversion works
The tool parses your JSON and renders it as idiomatic YAML — two-space indentation, lists with dashes, keys unquoted where safe. The data is identical; the format becomes the one humans prefer to edit and version-control diffs stay readable.
JSON to YAML for humans, not machines
JSON is fine for machines and tedious for people: no comments, mandatory quotes, braces that grow eyesores. YAML is the config format humans maintain — converting a JSON config to YAML before handing it to a team is a kindness that costs nothing.
Quoting in the output
Values that YAML would misinterpret — strings that look like numbers or booleans, special leading characters — are quoted automatically in the output. The quoting keeps the round trip exact: parse the YAML back and you get the original JSON.
Frequently asked questions
Does the conversion keep my key order?
Yes — YAML preserves the JSON object key order, so the output reads in the same sequence as the input.
Why do some strings appear quoted in the YAML?
Strings that YAML would otherwise parse as numbers, booleans, or nulls are quoted to keep them strings — the automatic quoting is what makes the round trip lossless.
Can the YAML output include comments?
No — JSON carries no comments to convert, and YAML comments would have to be invented. Add them after conversion if your config needs them.