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YAML Formatter

Beautify YAML with consistent indentation and optional key sorting. Validates syntax and supports multi-document files.

Runs in your browserYAML → YAML
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Example

Input
name:   app
ports: [80,   443]
env: {debug: false}
Output
name: app
ports:
  - 80
  - 443
env:
  debug: false

How to use the YAML Formatter

  1. Paste or type your YAML into the input area, or open a file from your device.
  2. Adjust the options above the editor if the tool offers any.
  3. Review the YAML result, then copy it or download it as a file.

Privacy and limitations

  • Your data is processed on your device and is not uploaded to any server.
  • Comments are removed and anchors/aliases are expanded during formatting.

Frequently asked questions

Are comments kept when formatting?

No. The YAML is parsed and re-serialised, so comments are dropped and anchors/aliases are expanded. Keys, values and order are preserved.

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