YAML Validator

Validate YAML syntax online.

Developer

Paste YAML to validate syntax. Errors are shown with a message. Valid YAML is confirmed. Runs in your browser.

About YAML Validator

This tool checks whether your text is valid YAML. It uses the js-yaml library to parse and reports any syntax error. Use it to verify config files or YAML content before using it in CI or apps.

How to use

  1. Paste your YAML into the box.
  2. Click Validate YAML. You will see either an error or "Valid YAML."

Frequently Asked Questions

What does the validator check?
It parses YAML and reports syntax errors (indentation, colons, quotes, etc.). It does not validate against a schema.
Is my YAML sent to a server?
No. Validation uses the js-yaml library in your browser. Your data never leaves your device.
Can I convert YAML to JSON here?
Use the YAML to JSON converter tool for that. This tool only validates syntax.