Which YAML spec is supported?

YAML 1.2 via the js-yaml library — the de-facto standard for modern tooling (Kubernetes, GitHub Actions, etc.).

Does this handle multi-document YAML?

Yes, YAML files with --- separators are parsed as arrays of documents.

YAML Validator & Formatter

Free YAML validator. Paste YAML to check syntax, see structured errors with line numbers, and convert to JSON (or JSON to YAML). Useful for Kubernetes, GitHub Actions, CircleCI, Docker Compose, and any YAML config.

YAML Input

JSON Output

{
  "name": "eztooly",
  "version": 1,
  "tools": [
    {
      "slug": "json-formatter",
      "category": "developer"
    },
    {
      "slug": "sql-formatter",
      "category": "developer"
    }
  ]
}

✓ Valid

Frequently Asked Questions

References

YAML 1.2 Specification — YAML.org

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Frequently Asked Questions

References and sources

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