Inspect and format YAML in your browser.

YAML File Tools validates and formats YAML without sending file contents to a conversion service. It is operated by Ship It! Software Limited.

What it does

The tool reports documents, anchors, aliases and custom tags, rejects duplicate mapping keys, and offers JSON only when the conversion is representable.

What it does not do

It does not execute custom tags or claim JSON is lossless for every YAML document. There are no accounts or server-side file storage.

Read the Privacy Policy and Terms to learn how the tool works and handles data.