How to format and validate XML
XML (eXtensible Markup Language) is a markup language much like HTML, but designed specifically to store and transport data. Because it relies heavily on nested tags, a raw or minified XML file is virtually impossible to read manually.
Our tool uses your browser's native XML DOM Parser to first validate the code—ensuring there are no missing closing tags or syntax errors—and then applies standard indentation and line breaks to beautify it for easy reading. Alternatively, you can use the Minify function to strip all whitespace and reduce file sizes for server-to-server API communication.
XML Validator FAQ
How does the XML Validator work?
When you click "Format" or "Minify", our client-side script parses your text. If your XML contains an error (such as a tag that was opened but never closed, or an invalid character), the parser catches it instantly and highlights the exact error line in a red notification box.
Is my data sent to a server?
No. We understand that XML files often contain sensitive business data (like invoices or customer records). The formatting and validation happen entirely locally on your device, ensuring maximum privacy and security.