XPathEyes is an XPath expression evaluator for the web, with graphical XML tree rendering. Try it online.
You can use the file URL argument to specify file to be loaded from the same web server.
You can also drag-and-drop local files onto the file contents area.
If the expression is incorrect, an error message is displayed. Otherwise, the number of selected nodes is displayed, and the nodes themselves are highlighted in yellow in the tree and in the textual rendering.
Click on the tabs at the top to switch between the graphical and textual representations.
XPathEyes uses the browser's internal XPath implementation. Google and Firefox are reported to work.
© Christophe Jacquet, 2014. Released under the MIT license.