About YAML Formatter

Format and beautify your YAML data with this free online tool. Make your YAML code easy to read with proper indentation and syntax highlighting

Normalize YAML indentation and collection layout for configuration files, manifests, pipelines, and data documents.

Key features

  • Formatting purpose Normalize YAML indentation and collection layout for configuration files, manifests, pipelines, and data documents.
  • Supported source Paste one or more YAML documents containing mappings, sequences, scalars, anchors, aliases, or block strings supported by the parser.
  • Style controls Choose indentation and output preferences, then inspect how quoting and multiline values are represented.
  • Formatted result The formatted YAML makes hierarchy visible and can be copied back into deployment or application configuration.

How to use YAML Formatter

Follow this workflow to work with YAML documents safely and accurately.

  1. Paste or enter the source Paste one or more YAML documents containing mappings, sequences, scalars, anchors, aliases, or block strings supported by the parser.
  2. Choose formatting rules Choose indentation and output preferences, then inspect how quoting and multiline values are represented.
  3. Format the source Run the formatter after the source parses successfully. It will apply presentation rules without intentionally changing the parsed structure.
  4. Review and copy The formatted YAML makes hierarchy visible and can be copied back into deployment or application configuration.

Usage tips

  • Use spaces, not tabs, for indentation.
  • Quote values such as yes, no, dates, and numbers when downstream type coercion would be risky.
  • Validate Kubernetes, CI, or application schemas separately after syntax formatting.

Frequently asked questions

Normalize YAML indentation and collection layout for configuration files, manifests, pipelines, and data documents.
Paste one or more YAML documents containing mappings, sequences, scalars, anchors, aliases, or block strings supported by the parser.
Choose indentation and output preferences, then inspect how quoting and multiline values are represented.
YAML versions and parsers differ in implicit typing, duplicate-key handling, anchors, and custom tags, so a successful parse may still behave differently downstream.