YAML Validator
Paste YAML to check whether it is valid. If it isn't, see exactly which line and column broke. Everything runs locally in your browser.
Your YAML is validated in this browser and is not sent to Docspira. Learn more.
What this checks
This tool checks whether your YAML is syntactically valid using a YAML 1.2 parser — the same engine Docspira's YAML ↔ JSON converter uses. It reports the line and column of the first error, supports multi-document YAML (separated by "---"), and understands anchors, aliases, merge keys, and block scalars. It does not validate Kubernetes, Docker Compose, or GitHub Actions schemas, and it is not a linter or a formatter — it only checks syntax.