YAML Validator

What is YAML Validator?

A YAML validator checks whether your YAML document can be successfully parsed, identifying syntax errors that would cause application failures. Common YAML errors include incorrect indentation (YAML is whitespace-sensitive), tabs mixed with spaces, duplicate keys, and invalid data types. Beyond validation, the tool reports structural information: top-level keys, the number of meaningful data lines (excluding comments and blanks), and the document size in bytes. This is essential before deploying configuration files, as YAML syntax errors in Kubernetes, Docker Compose, or CI/CD pipelines can cause deployment failures and downtime.

How to Use YAML Validator

1. Paste your YAML.
2. Click Validate YAML.
3. See validation result and structural info.
4. Fix any errors before deploying.

Common Use Cases

• Validating Kubernetes manifests before deployment
• Checking Docker Compose files for syntax errors
• Verifying CI/CD pipeline configurations
• Debugging YAML parsing failures

Related Variations