How to use XML Checker
- Paste the XML you need to check into the input box.
- The result is computed live in your browser as you edit the input.
- Use Copy to keep or reuse the result.
About this tool
XML Checker is a static, client-side tool with no backend. XML Checker works on the XML you paste locally, keeping your markup intact while it processes it.
Well-formedness issues are flagged so you can fix structure quickly. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
How do I use XML Checker?
XML Checker lets you check your input right in the browser, with the result shown instantly and nothing uploaded.
Does XML Checker cost anything?
No — XML Checker is completely free, with no sign-up and no hidden limits.
Does XML Checker upload my data?
No — XML Checker processes everything locally in your browser, so nothing you enter is uploaded or stored.
Does XML Checker preserve attribute order and namespaces?
XML Checker works on the XML you paste locally and keeps your markup intact while it checks it.
Does XML Checker work offline?
Once the page has loaded, XML Checker keeps working with no network connection.