Parse one YAML document strictly and report syntax diagnostics, document shape, aliases, depth, and size without transforming the source.
Inputs are limited to 1 MiB and stay in this browser tab.
Nothing is placed in a URL, account, preset, or remote log.
Strict, bounded, local processing
Syntax validity confirms that the complete document can be parsed under the supported YAML rules. It does not prove that Kubernetes, CI, or another consumer accepts its fields.
Indentation, sequence markers, flow punctuation, quoted scalars, anchors, and document boundaries all affect YAML parsing. The validator reports the parser's bounded location and reason while leaving the editable input untouched.
A valid report describes the parsed root and safe structural counts. It never interprets tags as executable code and never sends the document to a Tool Swim processing endpoint.
A deployment manifest may require named fields, exact scalar types, or application-specific ranges that YAML itself does not define. Use the schema validator when a JSON Schema is available, then test the same contract at the consuming boundary.
