Free JSON to YAML Converter
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About the JSON ↔ YAML Converter
Convert JSON to YAML and YAML back to JSON instantly — with clear error messages for invalid input, all in your browser with no upload.
How to use the JSON ↔ YAML Converter
- 1Pick the direction: JSON → YAML or YAML → JSON.
- 2Paste your document on the left.
- 3The converted result appears on the right — errors show what went wrong and where.
- 4Click Copy to grab the result.
Frequently asked questions
Is my data uploaded anywhere?
No — conversion runs entirely in your browser, so pasting config files with real values (API hosts, service names) is safe.
When is YAML better than JSON?
YAML is easier for humans to read and write — no braces or quoted keys, and it allows comments — which is why Kubernetes, CI pipelines and Docker Compose use it. JSON is stricter and better for machine-to-machine APIs.
Will converting YAML to JSON lose my comments?
Yes — JSON has no comment syntax, so comments are dropped. Everything else (structure, values, types) converts faithfully.
Why did my unquoted YAML value change type?
YAML guesses types: yes/no become booleans, 1.0 becomes a number, and values like 07:30 can surprise you. Quote a value in your YAML to force it to stay a string.
Which YAML version is supported?
YAML 1.2 — the current standard — via a well-tested parser, with clear error messages that point at the problem line.