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YAML Validator & Formatter

Validate YAML and format it canonically.

Get it in the desktop app

What it does

Validate YAML and format it canonically. Part of Developer Tools — Format, validate, encode, and inspect.

When to use it

Validate a CI workflow file and canonicalize its formatting.

Privacy & safety

Parses and formats locally; scripts are never executed. Paste only code you are allowed to share with your own machine.

This tool works on text you paste — nothing leaves the page until you copy or save it yourself.

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