XML to YAML — Convert XML Data to YAML Format in Your Browser

XML to YAML is a conversion between two formats that rarely meet in the wild. XML is the established interchange format for document-oriented data — SOAP messages, RSS feeds, XHTML documents, financial transaction logs — where the data carries metadata alongside the values. YAML is the configuration language of the DevOps era — Kubernetes manifests, Ansible playbooks, Docker Compose files, CI/CD pipeline definitions — where the data is written by humans and read by machines. The conversion from XML to YAML is most often a one-off task: an API response in XML needs to become a YAML config file for a deployment tool, or an XML dataset needs to be inspected in a more readable format for debugging.

The conversion path goes through JSON as an intermediary. The XML is parsed into a tree, the tree is converted to a JSON object using configurable attribute and namespace conventions, and the JSON is serialised as YAML. The JSON intermediary is invisible but matters for two reasons. First, it means the attribute convention you choose for this tool is the same convention the XML-to-JSON tool uses — the @attr prefix is the default and is the most widely interoperable choice. Second, it means any limitations of the XML-to-JSON mapping (mixed-content handling, namespace collision behaviour) apply to the YAML output as well. The tool does not add new limitations beyond those inherent to the XML format.

For a final hand-off: if the YAML output is going into a Kubernetes or Ansible deployment, validate it with the target tool’s linter (kubectl apply --dry-run or ansible-playbook --syntax-check) before deploying. If the output has deeply nested indentation that is hard to scan, switch to flow style for leaf values to compress the visual depth. If you need the reverse conversion — YAML to XML — the YAML-to-XML tool on this site handles the round-trip with the same configurable conventions.