YAML Validator & Formatter

Validate YAML syntax and convert between YAML and JSON. Catches indentation errors and reports line numbers.

YAML Input

JSON Output

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

✓ Valid

Frequently Asked Questions

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.

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