XML Formatter & Validator
Format, validate, and beautify your XML instantly. Free online XML formatter and validator for developers. No data sent to server. Fast, secure, and easy to use.
Input XML
Formatted Output
Formatted XML will appear here
What is XML?
XML (eXtensible Markup Language) is a markup language that defines rules for encoding documents in a format that is both human-readable and machine-readable. It's widely used for config files, web services (SOAP, REST), and data exchange.
Core XML Concepts
- Elements are enclosed in angle brackets:
<tag> - Tags must be properly closed:
<tag>content</tag> - Attributes go inside the opening tag:
<tag attr="value"> - XML is case-sensitive and must have a single root element.
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Frequently Asked Questions
What is an XML formatter?
An XML formatter beautifies raw XML by adding proper indentation and line breaks, making it easier to read and debug. It also validates that your XML is well-formed.
Is my XML data sent to a server?
No, all formatting and validation happens locally in your browser. Your data is never sent to any server, ensuring privacy and security.
What makes XML invalid?
Common issues include unclosed tags, mismatched tags, invalid characters, unescaped special characters in attributes, and malformed structure. The validator will report the error location when possible.
What is XML minification?
Minification removes unnecessary whitespace and line breaks to reduce file size. Useful for production configs or when transmitting XML over networks.
Is this XML formatter free?
Yes, this tool is completely free to use with no sign-up or limits.