Will comments be preserved?

No — because formatting works by parsing and re-serializing the data, comments are not preserved in the output.

Does it validate my YAML?

Yes, indirectly — since the tool must parse your YAML to reformat it, invalid syntax will surface as an error instead of output.

Will key order change?

Key order is generally preserved, following standard YAML parsing behavior.

YAML Formatter

Format and validate a YAML document. Paste your YAML and get normalized, correctly indented output instantly, entirely in your browser.

How to Use YAML Formatter

1
Paste your YAML into the input area.
2
Click Format to normalize indentation.
3
Copy the result or download it as a .yaml file.

YAML Formatter Features

Parses and re-serializes YAML with consistent, correct indentation.
Doubles as a validator — invalid YAML shows a clear parse error.
Runs entirely in your browser.

Why use Tool King?

Fast

No waiting rooms or sign-ups. Most files are ready in seconds.

Private

Files are processed in memory and discarded right after — never stored or shared.

Free

Every tool is free to use, with no hidden limits on the essentials.

Frequently Asked Questions

Related guides

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