YAML Formatter
Beautify YAML configuration or data text while preserving its parsed structure.
Reformat YAML with consistent indentation and report syntax errors.
Processing happens in this browser. Your input is not uploaded or saved.
🔒 All processing happens in your browser — files never leave your device. Your input stays in this browser and is not uploaded to Smart Online Tools.
How it works
- Paste YAML into the editor.
- Select Format YAML.
- Copy the formatted result or correct a syntax error.
Good to know: YAML indentation is meaningful. Formatting cannot determine whether a valid document matches an application's expected configuration.
Privacy and processing
All processing happens in your browser — files never leave your device. Your input stays in this browser and is not uploaded to Smart Online Tools.
YAML formatting tips
YAML commonly represents settings, lists, and nested data. Indentation defines relationships between keys and values, so use spaces consistently and avoid tabs for block indentation.
The formatter parses YAML before printing it. Keep the original when comments, anchors, aliases, or formatting conventions are important to your project, then review the output in the application that consumes it.
Frequently asked questions
What does YAML Formatter do?
Format YAML data with consistent indentation and line breaks. Beautify YAML configuration or data text while preserving its parsed structure.
Does this tool upload my files or input?
Your input stays in this browser and is not uploaded to Smart Online Tools.
What should I know before using this tool?
YAML indentation is meaningful. Formatting cannot determine whether a valid document matches an application's expected configuration.