XML Validator
XML Validator is a free online XML Tools tool that check XML well-formedness with precise error messages instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Description
Check XML well-formedness with precise error messages.
- Because everything is computed client-side, XML Validator is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using XML Validator takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Examples
These ready-made examples show typical inputs and the exact output XML Validator produces for them.
<?xml version="1.0"?> <catalog><book id="1"><title>XML</title></book></catalog>
Reports mismatched or unclosed tags with the offending tag name. Try removing one </book> to see the error.
Use cases
Common situations where XML Validator helps:
- Check XML well-formedness with precise error messages.
- Because everything is computed client-side, XML Validator is safe to use with sensitive data such as API keys, tokens or private logs.
FAQ
What is XML Validator?
XML Validator check XML well-formedness with precise error messages. It runs entirely in your browser, so your data stays private.
Is XML Validator free to use?
Yes. XML Validator is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.