How does client-side XML validation work?

The tool uses the browser native DOMParser to parse the XML string. If the document is malformed (e.g. unclosed tags, mismatching elements, or invalid characters), DOMParser returns a parsererror element specifying the exact line and column where parsing failed.

Can I test XPath queries on my XML?

Yes. The XPath Evaluator runs document.evaluate() directly against the parsed DOM tree, allowing you to select elements, attributes, or text content using standard XPath 1.0 syntax.

Is my XML data kept private?

Yes. 100% of formatting, minification, validation, and XPath queries run in your browser. No data is sent to external servers.

XML Formatter & Validator

Beautify, format, minify, and validate XML documents. Inspect syntax errors with line/column coordinates and query XML nodes using standard XPath 1.0 expressions.

100% Client-Side Privacy

XPath 1.0 Evaluator

Matched 0 nodes. Click "Evaluate XPath" to run query.

Input XML 0 characters

Formatted Output 0 characters

Frequently Asked Questions

How does the XML validator detect malformed tags?

The validator passes your string through the browser's native DOMParser using the text/xml MIME type. If an open tag lacks a closing tag or an attribute has unescaped quotes, the parser extracts line and column error details.

What XPath syntax is supported?

All standard XPath 1.0 expressions supported by browser DOM engines: node selectors (//item, ./title), attribute filters (//book[@category='web']), functions (count(//book), string(//name)), and predicates ([position() = 1]).

Can I minify XML for production deployment?

Yes. The Minify button strips whitespace between elements, collapses redundant spacing, and removes XML comments to minimize payload transfer size.

Is my XML document uploaded to any external server?

No. All parsing, validation, formatting, and XPath evaluations execute 100% locally in your browser.