XML Viewer, Formatter & Validator - Free Online Tool

XML Viewer, Formatter, and Validator helps you quickly view, edit, beautify, and validate XML data online.

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Formatting Options

Indentation

Quote Style

Self-closing Tags

Line Breaks

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Auto-format on change

Preserve comments

Collapse empty elements

XML Tools

About XML Formatting

What is XML?

XML (eXtensible Markup Language) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.

Why Format XML?

Formatting XML makes it more readable with proper indentation and structure. This is especially helpful when working with large or complex XML documents.

Common XML Uses

Data storage and transmission
Configuration files
Web services (SOAP, REST)
Document formats (OOXML, ODF)

XML Syntax Rules

XML documents must have a root element
All elements must have a closing tag
XML tags are case sensitive
Attribute values must be quoted

XML Example

<?xml version="1.0" encoding="UTF-8"?>
<catalog>
  <book id="bk101">
    <author>Gambardella, Matthew</author>
    <title>XML Developer's Guide</title>
    <genre>Computer</genre>
    <price>44.95</price>
    <publish_date>2000-10-01</publish_date>
    <description>An in-depth look at creating applications with XML.</description>
  </book>
  <book id="bk102">
    <author>Ralls, Kim</author>
    <title>Midnight Rain</title>
    <genre>Fantasy</genre>
    <price>5.95</price>
    <publish_date>2000-12-16</publish_date>
    <description>A former architect battles corporate zombies.</description>
  </book>
</catalog>