A Simple, Fast Tool to Format, Beautify, and Validate XML

Meet XmlLint – a powerful, yet very modern client-only XML formatting and validation tool that can format, validate, or beautify any document or XML snippet (and do it all in a matter of a few seconds)!

4 Super Easy Ways You Can Use XmlLint Right Away

  1. TYPE – Type your very own custom XML into the editor.
  2. PASTE – Paste code from your clipboard right into the editor.
  3. DRAG & DROP – Easily Drag & Drop your local file over into the editor.
  4. PASTE YOUR URL – Format remote XML files by pasting the URL into the editor. (more info)

Nervous About Posting Your Sensitive Data?

XmlLint is completely client-side! If you have sensitive data that you want to quickly format, your information will never be saved, shared stored or even transmitted to our own servers here at XmlLint. All XML data processing will occur within your own browser only.

Common XML Errors & Rules You Need To Know

  • Don’t forget the root tag – Remember, XML is like a tree structure and needs a single root element in place.
  • It’s important to note that duplicate attribute names within a tag are not permitted with XML.
  • XML is NOT HTML. XML does not recognize self-closing tags like HMTL, so be sure to close all tags!
  • Be sure to follow all XML rules. Unsure of the rules? No problem – you can read them here.

Formatting across Operating Systems

Your XML might not validate if you copy text from a file that was saved on an operating different than what you are currently working on. This is due to the fact that Windows and Linux/Mac use a differnt ways to indicate a new line. The Windows operating system family uses two characters \r\n (carriage-return and newline), whereas Linux and Mac systems only use a single \r character. If you are encountering this problem, simply use the newline character that your current OS expects. For more details as to why this is still an issue in 2020, please visit this page.