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Convert YAML to XML

Free YAML to XML converter that parses mappings, sequences, quoted scalars and flow styles, then builds valid prettified XML. Choose the root element name, attribute handling and compact output. Runs in your browser — nothing is uploaded.

Input
Output

About Convert YAML to XML

Configuration files increasingly live in YAML, but plenty of consumers still require XML. Convert YAML to XML parses your YAML — nested mappings, sequences, quoted scalars, comments and flow styles — and emits valid, prettified XML that matches the source structure.

The conversion rules are yours: choose the root element name, decide whether @-prefixed keys become attributes, and pick compact or formatted output. Because the parser runs in your browser, config files never leave your machine.

Features

  • Indentation-based YAML parser: nested mappings and sequences follow YAML block structure.
  • Sequence support: list items become repeated sibling elements, including multi-line map items.
  • Quoted scalars: single and double quoted strings are parsed with the usual escaping.
  • Comments stripped: inline and full-line comments are ignored during parsing.
  • Flow styles: basic inline arrays [a, b] and maps {k: v} are supported.
  • Scalar typing: numbers, booleans and null are recognised and rendered as text.
  • Attribute option: @-prefixed keys become XML attributes with a configurable prefix.
  • Custom root element: name the outer tag to match your target schema.
  • Prettified by default: readable, indented XML; compact mode for payloads.
  • Copy, download or print: the XML is a click from your clipboard.

How to Use

  1. Paste your YAML or load it from a file.
  2. Set the root element name for the outer tag.
  3. Choose attribute handling — enable @-key attributes and set the prefix if needed.
  4. Pick prettified or compact output.
  5. Copy or download the XML, or print it to PDF.

Examples

Example 1 — Config migration. An application ships YAML configuration but a downstream system accepts XML. Convert with the root element matching the target format and feed it straight in.

Example 2 — CI pipelines. YAML job definitions converted to XML can drive older build orchestrators that predate YAML-native tooling.

Example 3 — Data exchange. YAML exports converted to XML slot into XML-based partners without rewriting the source data.

Example 4 — Round-trip verification. Convert YAML to XML, then use the XML to YAML tool on the result. Matching structure confirms your mapping rules.

Benefits

  • Modern to legacy — YAML configs made XML-consumable.
  • Real YAML parsing — nested blocks, sequences and quotes handled properly.
  • Schema-friendly output — root name and attributes are your choice.
  • Readable or compact — both output styles available.
  • Free and private — local parsing, nothing uploaded.

Frequently Asked Questions

Which YAML features are supported?
The converter supports the common subset: nested mappings, sequences, multi-line list items, single and double quoted scalars, comments, flow-style arrays and maps, and standard scalar types (numbers, booleans, null). Document markers (---) and anchors/aliases are not supported.
How do YAML keys become XML?
Each mapping key becomes an element name. Nested mappings become nested elements, sequences become repeated sibling elements, and scalar values become element text. Keys prefixed with @ become XML attributes when the attribute option is on.
How is a YAML sequence handled?
A sequence becomes repeated elements. Under a list of maps, each map becomes one element with its keys as children — the natural XML shape for YAML list items.
What about numbers and booleans?
They are converted to their text form: 249.99 becomes the text 249.99 and true becomes true, since XML has no separate scalar types. The prettified output is identical to what a downstream XML parser will see.
Is my YAML uploaded anywhere?
No. Parsing and conversion run entirely in your browser; nothing is transmitted, stored or logged.