XML Validator Tool
Validate XML structure and check for unclosed tags. Free browser tool — no signup.
Quick Answer
Paste XML to validate its structure: check for unclosed tags, mismatched elements, and report element and attribute counts.
How to Use the XML Validator Tool
- Use the input area to provide your data.
- The tool processes it instantly in your browser.
- Copy or download the result.
Frequently Asked Questions
- Is this tool free to use?
- Yes, completely free with no signup, no ads tracking, and no data sent to servers. Everything runs locally in your browser.
- What is the difference between valid and well-formed XML?
- Well-formed XML follows syntax rules (matching tags, proper nesting). Valid XML is well-formed AND matches a specific schema (DTD or XSD). This tool checks well-formedness — the foundational requirement.
About This Tool
This XML Validator Tool provides a simple, focused interface for processing XML data without any unnecessary complexity. Paste your data, click the button, and get your result. The tool is designed for efficiency — no account creation, no configuration dialogs, no feature bloat. It does one thing well: processing XML data quickly and accurately. The minimalist interface loads instantly and runs smoothly on any device, from powerful workstations to budget smartphones. All processing uses the browser's native JavaScript engine, ensuring both speed and compatibility. This focused approach makes it the fastest way to process XML data when you need a quick result without launching a full development environment or installing specialized software.
What is XML Validator?
An XML validator checks whether your XML document is well-formed according to the XML specification. Well-formed XML requires every opening tag to have a matching closing tag, tags to be properly nested (no overlapping), elements to use consistent naming, and special characters to be properly escaped. Validation is essential before processing XML in applications, sending SOAP requests, deploying XML configuration files, and processing data feeds. This tool identifies specific structural issues: mismatched tags, unclosed elements, and nesting problems, along with reporting the number of elements and attributes found in the document.
How to Use This Tool
- Paste your XML.
- Click Validate XML.
- See whether the document is well-formed or has issues.
- Review the specific errors or structural information.
Common Use Cases
- Quick JSON processing without installing software
- Browser-based formatting for remote work
- Lightweight alternative to IDE-based JSON tools
- Accessible JSON processing for non-developers
Examples
<?xml version="1.0"?><catalog><book id="bk101"><title>XML Guide</title><price>9.99</price></book></catalog>
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