XML to YAML Converter Online 2026 - Fast, Secure & Private
Convert XML to YAML online instantly. Transforming XML structures into readable YAML configuration files. 100% client-side privacy. Free online tool.
Key Features
- ✅ Preserves object structure
- ✅ Clean YAML output
- ✅ Attribute conversion support
- ✅ Browser-based processing
How to Use
- Input your XML content
- Preview the structural mapping, including attribute (@) keys
- Generate the YAML formatted output
- Copy the YAML for use in deployments or config files
Expert FAQ
- XML distinguishes attributes from child elements — does that distinction survive in the YAML output?
Yes, using the same "@name" key convention as this site's XML to JSON converter: <item id="5"> becomes a mapping with an "@id" key alongside its other children, rather than attributes and elements being silently merged into indistinguishable keys. This preserves enough information to reconstruct the original XML shape if you convert back. - A tag appears once in this document but could appear multiple times in another — does it become a YAML list or a single mapping?
Repeated sibling tags always normalize to a YAML sequence, even when only one instance is present in a given document — the same normalize-to-array policy this site's XML to JSON converter uses, applied here so downstream YAML consumers (a Kubernetes manifest generator, a config loader) don't break on documents where a normally-repeatable element happens to appear only once. - Will a text value like "on" or "no" extracted from XML come out quoted in the YAML, or does it turn into a boolean?
It's quoted deliberately. XML has no native boolean type — every value is text — so a value of "no" from an XML text node is quoted in the YAML output to guarantee it survives as the string "no" rather than being reinterpreted as the boolean false by a YAML 1.1 parser reading the result later (the same "Norway problem" that affects JSON to YAML).
Technical Details
Converting XML to YAML has to bridge the same structural gap as XML to JSON — attributes vs. child elements, mixed content, and XML's total lack of native data types — but then also apply YAML's specific scalar-quoting rules on the way out. Attributes become "@name" keys (matching the convention used elsewhere on this site), and repeated sibling tags always normalize to YAML sequences regardless of how many times they appear in a given document, so a downstream consumer expecting a list doesn't break on documents where a normally-repeatable element happens to appear just once. Because XML has no type system — every attribute and text node is fundamentally a string — this converter deliberately quotes any extracted value that YAML's looser 1.1-era grammar could otherwise misread as a boolean, null, or number (the same "Norway problem" — bare no/yes/on/off resolving to booleans — that affects JSON to YAML). Since the source data was always text in XML, quoting it in the YAML output is the conservative, round-trip-safe choice rather than letting a downstream parser guess a type that wasn't actually present in the source. CDATA sections and comments are two more places XML and YAML diverge: CDATA content is unwrapped to plain text in the YAML output (YAML has no equivalent "raw" block with the same semantics), and XML comments have no direct YAML mapping either, though some tooling represents them as YAML # comments on a best-effort basis. After conversion, the YAML Validator confirms the result parses cleanly, and the YAML Formatter can clean up indentation for a config file that's going to be hand-edited afterward.