XML

Validate and pretty-print XML.

<?xml version="1.0" encoding="UTF-8"?>
<catalog>
  <book id="bk101">
    <author>Alice</author>
    <title>Renderhub Reference</title>
    <year>2026</year>
  </book>
  <book id="bk102">
    <author>Bob</author>
    <title>SSG Patterns</title>
    <year>2025</year>
  </book>
</catalog>

Tips

Pretty-print rewrites the document with consistent indentation.
Validation runs in your browser via DOMParser.