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Format, beautify, and validate YAML configurations for Kubernetes manifests, Docker Compose, and CI/CD pipelines. Pinpoints syntax errors, illegal tabs, and indentation mismatches.
Follow these simple steps to get instant, accurate results directly in your browser:
Paste your raw YAML file, Kubernetes manifest, or CI/CD workflow into the code editor.
Click 'Format YAML' to automatically organize indentation, or fix syntax errors highlighted by the validator.
Copy the perfectly formatted YAML code or download it directly as a .yaml configuration file.
The Free YAML Formatter & Validator is an essential DevOps and developer utility that formats, indents, lints, and validates YAML (YAML Ain't Markup Language) documents in real time. It detects syntax errors, highlights invalid indentation, formats irregular spacing, and converts clean YAML code for production environments.
YAML is the standard configuration language powering modern cloud infrastructure—including Kubernetes pod manifests, Docker Compose configurations, GitHub Actions CI/CD pipelines, GitLab CI, and Ansible playbooks. However, because YAML relies strictly on semantic whitespace indentation rather than curly braces, minor indentation errors or accidental tab characters can invalidate entire production deployment manifests.
Our formatter parses your YAML against the official YAML 1.2 specification, instantly pinpointing line numbers and error descriptions for unescaped colons, mismatched array hyphens, and illegal tabs. It also provides one-click JSON preview and YAML minification.
Instantly reports exact line numbers, column positions, and reasons for syntax failures.
Format code using industry-standard 2-space or 4-space indentation hierarchy.
Automatically identifies and converts prohibited tab characters into valid YAML spaces.
Your proprietary infrastructure manifests and server configurations never leave your browser.
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