XML Formatter & Validator

Format, validate, minify and beautify XML data. Instantly check if your XML is well-formed and view it in a readable format.

How It Works

This tool parses your XML input using the browser's native DOMParser API. All processing happens entirely in your browser — no data is sent to any server.

• Format — parses the XML and re-serializes it with consistent indentation (2 spaces, 4 spaces, or tabs)
• Minify — removes all unnecessary whitespace to produce the smallest possible output
• Validate — checks that the XML is well-formed and reports the exact error if invalid
• Tree View — renders a collapsible tree for visual exploration of the XML document structure

About XML

XML (Extensible Markup Language) is a markup language and file format for storing, transmitting, and reconstructing data. It defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.

XML Syntax Rules

• Every XML document must have a single root element
• Elements must have matching opening and closing tags: <tag>...</tag>
• Empty elements can be self-closing: <tag />
• Attribute values must be quoted: <tag attr="value">
• Element names are case-sensitive: <Name> and <name> are different
• Special characters must be escaped: <, >, &, ", '

Common Use Cases

• Configuration — Maven pom.xml, Android manifests, Spring configs, .csproj files
• Data Exchange — SOAP web services, RSS/Atom feeds, SVG graphics
• Document Formats — XHTML, DocBook, Office Open XML (.docx, .xlsx)
• Transformation — XSLT stylesheets transform XML into other formats