YAML to XML

YAML is the widespread configuration format for CI pipelines, Docker Compose and Kubernetes - with indentation instead of brackets. XML is the established markup format for data exchange, office documents, RSS feeds and many enterprise interfaces - with tags and attributes. This tool reads your YAML file and writes the same structure as well-formed XML.

The conversion runs entirely locally in your browser: js-yaml reads the YAML, fast-xml-parser writes the XML, both pure JavaScript. Mappings become nested elements, sequences become repeated elements, scalars become element text. An XML document needs exactly one root element; if your YAML has several top-level keys or is a sequence, the content is placed neatly under a root element so the result is always well-formed.

Keys carrying the @_ prefix are turned back into real XML attributes, matching the XML to YAML counterpart - so a round-trip survives the structure. It stays honest about it: YAML timestamps are written into the XML as ISO 8601 text, because XML has no date type of its own. The result is indented, readable XML with a declaration header. Nothing is uploaded.

Specifications

In 3 steps

1. Drop or pick your YAML file.
2. The tool converts it into XML.
3. Download the XML file.

Limitations: Mappings become nested elements, sequences become repeated elements, @_ keys become XML attributes. Several top-level keys or a sequence at the root are placed under a root element so the XML has exactly one root. YAML timestamps are written as ISO 8601 text (XML has no date type). Invalid YAML is rejected with a clear message.

FAQ

Related tools

• XML to YAML
• JSON to XML
• YAML to JSON