YAML formatter

Format and validate YAML streams, keeping comments, with indentation, key sorting, quoting and line width options.

Indentation

Fold long strings at

Collections

Strings

Quote styles apply to values; keys are only unquoted.

Sort keys

Indent list items

YAML

Try:

Formatted YAML

Comments, anchors, aliases and tags are kept. Aliases are never expanded, so the output stays the size of the input.