YAML Validator

YAML (YAML Ain't Markup Language) uses indentation to define structure. The most common errors are incorrect indentation, missing colons, tab characters (YAML requires spaces), and improper quoting of special characters.

Validates full YAML 1.2 syntax and auto-detects popular config formats: GitLab CI/CD pipelines, Kubernetes manifests, Docker Compose files, GitHub Actions workflows, and Ansible playbooks. Detection is based on key structure analysis.

Valid YAML is also shown formatted with consistent indentation and converted to JSON for easy comparison. Built on the yaml library.