XML Formatter & Minifier
What this tool does
Paste raw, minified, or malformed XML and the formatter validates it, then rewrites it with consistent indentation and syntax highlighting. Tags appear in coral, attributes in blue, and values in green β making it easy to spot structure at a glance. Switch to Minify mode to strip whitespace and comments for production use or network transmission.
How to use
- Paste XML into the left panel. Formatting runs automatically.
- Choose Format or Minify from the toolbar.
- In Format mode, select indent size: 2 spaces, 4 spaces, or Tab.
- Click Copy to copy the result, or Download to save as a file.
Frequently Asked Questions
What does an XML formatter do?
An XML formatter takes compressed or messy XML and rewrites it with consistent indentation so the structure is readable. It also validates the XML β if the document is malformed (unclosed tags, bad attributes), the formatter reports an error instead of producing output.
What is the difference between formatting and minifying XML?
Formatting adds indentation and line breaks to make XML human-readable. Minifying does the opposite: it removes all unnecessary whitespace and comments to produce the smallest possible file size. Use minified XML when transmitting data over a network; use formatted XML when editing or reviewing structure.
Why does my XML show a validation error?
Common causes: unclosed tags (every opening tag needs a closing tag or a self-closing />), mismatched tag names, unescaped special characters in text content (use &, <, > instead of &, <, >), or attributes missing quotation marks.
Is this XML formatter secure?
Yes. Formatting runs entirely in your browser using the built-in DOMParser. No data is sent to any server. Your XML never leaves your device.
What is XML used for?
XML (eXtensible Markup Language) is a text format for structured data. Common uses include configuration files (Maven POM, Android layouts, Spring), data exchange between systems, RSS and Atom feeds, office file formats (DOCX, XLSX), and SOAP web services.