YAML Formatter & Validator
YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files, data exchange, and APIs. This free online tool formats, validates, and prettifies YAML documents. Get instant validation with detailed error messages including line numbers. All processing happens locally in your browser.
Indent:
Formatted output will appear here
Features
Sparkles
Smart Formatting
Automatically indents and formats your YAML for readability.
Zap
Minify YAML
Compress YAML by removing whitespace for smaller file sizes.
CheckCircle2
Validation
Detect syntax errors with detailed error messages.
Frequently Asked Questions
Related Tools
Tags
yaml
formatter
validator
parser
yaml-lint