YAML to XML Converter

YAML → indented XML 1.0. Sequences repeat the parent tag, and keys that are not legal XML names are sanitized.

Root element

YAMLservice: checkout
replicas: 3
ports:
  - name: http
    port: 8080
  - name: metrics
    port: 9090
env:
  LOG_LEVEL: info
  TIMEOUT_MS: 2500
healthy: true

XML<?xml version="1.0" encoding="UTF-8"?>
<root>
  <service>checkout</service>
  <replicas>3</replicas>
  <ports>
    <name>http</name>
    <port>8080</port>
  </ports>
  <ports>
    <name>metrics</name>
    <port>9090</port>
  </ports>
  <env>
    <LOG_LEVEL>info</LOG_LEVEL>
    <TIMEOUT_MS>2500</TIMEOUT_MS>
  </env>
  <healthy>true</healthy>
</root>

YAML to XML Converter — Free Online Tool

Converts YAML 1.2 documents into indented XML 1.0 with a configurable root element, repeating the parent tag for each sequence item, escaping ampersands and angle brackets, and sanitizing keys that are not legal XML names, useful for feeding YAML-authored data into XML-only APIs, XSLT pipelines and enterprise integration tooling.

How to use the YAML to XML Converter

Open the tool above — it runs entirely in your browser, so your input never leaves this page.
Paste or type your input into the field, then press the relevant button (e.g. Encode / Decode, Generate, or Convert).
Copy the result from the output area with the copy button orCtrl/Cmd + C.
No signup, no upload, and no tracking — repeat as often as you need.

Frequently asked questions

How are YAML sequences turned into XML?

The parent tag is repeated once per item, which is the standard XML idiom for a list — ports: [a, b] becomes two <ports> elements rather than a synthetic wrapper element.

What happens to keys that are not valid XML names?

XML element names cannot contain spaces or most punctuation and cannot start with a digit. Illegal characters are replaced with underscores and a leading underscore is prepended when the name starts with a digit, so the output always parses.

Is the output escaped correctly?

Yes. Ampersands, less-than and greater-than in text content are escaped to &, < and >, so values containing markup or URLs with query strings do not break the document.

Free & private — why use this YAML to XML Converter

The YAML to XML Converter runs 100% client-side in your browser. Your data is never uploaded to a server, no account is required, and the tool is completely free. It works offline once the page has loaded and is part of a growing collection of privacy-first developer utilities.

More config & serialization

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