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YAML formatter & validator

Format parsed YAML, retain comments, and optionally sort mapping keys.

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Result

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Using this tool

Parse and format YAML documents, retaining comments and optionally sorting keys recursively.

Actions: Format · Validate

Example

Choose Format, two spaces, and key sorting; a comes before z.

Example action and settings

Action: Format
Indentation: 2 spaces
Sort mapping keys recursively: On

Input / action

z: 2
a: 1

Result / expected behavior

a: 1
z: 2

Available options: Indentation · Sort mapping keys recursively

Scope and limitations

Duplicate keys are rejected and alias expansion is bounded; formatting may change scalar presentation.

Common mistakes

YAML indentation cannot use tabs; passing syntax checks does not prove application configuration validity.

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