YAML to XML Converter
Convert YAML documents to XML with configurable root element name, array handling (repeated elements or indexed), null handling, CDATA wrapping and indentation.
Input
Conversion Options
Output
| Metric | Value |
|---|---|
| No data yet | |
Guides
What does this tool do?
It converts a YAML document into XML, with several options to control exactly how the conversion maps YAML's structures onto XML elements — since XML has no native concept of "list" the way YAML does, arrays need an explicit strategy.
How this tool works
- Paste your YAML into the input box.
- Set a root element name for the generated XML's outermost tag.
- Choose how arrays should convert: repeated elements wraps each array item in a singularized version of its parent key (
features→<feature>...</feature>repeated), or indexed appends a numeric suffix (feature_0,feature_1, ...). - Choose how null values should render: an empty element (
<key/>), omitted entirely, or marked with anxsi:nil="true"attribute (adding the standard XML Schema instance namespace). - Optionally wrap string values in
CDATAsections, toggle the XML declaration, and set the indentation.
The Summary table reports the element count, maximum nesting depth, and output size — useful for sanity-checking a large conversion.
Element name sanitization
YAML keys can contain characters that aren't valid in XML element names (spaces, symbols, a leading digit). Any such key is sanitized: invalid characters become underscores, and a name that doesn't start with a letter or underscore gets one prepended.
Mixed-type array warning
If an array mixes types (e.g. some string items and some numbers), the summary flags it — XML doesn't preserve JavaScript's type information the way YAML/JSON do, so mixed-type arrays are exactly where information is most likely to get lossy in the round trip.
Common uses
- Converting a YAML configuration file to XML for a system that only accepts XML
- Migrating data between YAML-based and XML-based APIs or pipelines
- Exploring how different array-handling strategies affect XML output shape
- Generating XML test fixtures from hand-written YAML
Privacy
This tool runs entirely in your browser. Your data is never uploaded to a server.
Use it from code
From 3 credits per callREST API
curl -X POST https://api.iotools.cloud/v1/tool/yaml-to-xml \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"yamlSource": "title: Project Configuration\nversion: 1.0\nsettin…",
"rootElement": "root",
"arrayHandling": "repeated",
"indent": "2",
"xmlDeclaration": "true",
"nullHandling": "empty",
"cdataStrings": "",
"prettyPrint": "true"
}'Swap in your own key from your account. The tool's fields are the body — no wrapper.
Ask an AI agent
Use the IOTools `yaml-to-xml` tool (YAML to XML Converter) on this input:
YOUR_INPUT_HEREPaste this at any agent connected to the IOTools MCP server, then add your input.