YAML formatter

YAML formatter lets you validate and format YAML 1.2, including duplicate keys in your browser.

⌂ Inputs and results stay in this browser and are not automatically stored or sent.

Waiting for inputFormatting also checks syntax.

How to use

Paste YAML with its original indentation and line breaks, then format it. Resolve duplicate keys or syntax errors first.

Compare sibling fields with nested fields. Check that tidying the layout did not change the intended hierarchy or value types. Alias expansion is limited rather than unlimited.

Examples

name: SheepDev
tools: 83

Principles and limits

Each input is limited to 1,048,576 bytes, output to 33,554,432 bytes, and processing to 5,000 ms. Input is never silently truncated.

Guides

Check YAML that fails to load

Related tools

Data and structured data

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