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YAML Validator & Formatter — Lint and Beautify YAML – Free Online Tool

Validate YAML syntax, highlight errors with line numbers, and auto-format for readability. Supports Kubernetes, Docker Compose, and GitHub Actions. Free, no signup required.

YAML

What is a YAML Validator?

A YAML validator checks your YAML files for syntax errors, indentation issues, and formatting problems. Essential for DevOps and configuration management.

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How to Use

  1. Paste YAML content
  2. View validation results
  3. Fix highlighted errors
  4. Copy formatted YAML

Use Cases

  • Validating Kubernetes manifests
  • Checking Docker Compose files
  • Debugging CI/CD configs
  • Formatting YAML for readability

FAQ

Does it support multi-document YAML?
Yes, documents separated by --- are validated independently.
Can it detect indentation errors?
Yes, indentation issues are highlighted with specific line numbers.

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