HEATKEYS

A web-based XML validator. Can be used for free. Validates XML files, prompts the user for referenced files (e. g., XSD), shows good error messages.

Online tools for developers, including formatters (JSON, XML, HTML, SQL, etc.), minifiers (JavaScript, CSS), validators, compactors and many more!

HTML XHTML CSS JavaScript XML XSL ASP SQL ADO VBScript Tutorials References Examples

Altova XMLSpy XML editor, plus other leading XML, data management, UML, and Web services software tools for application, web site, and database development, data conversion, and more.

Tools you can use, by Jonathan Hedley

Your feedback improving the quality and impacting the direction of Microsoft products. Find what Microsoft products are currently accepting bugs and suggestions from the community!

Java XML Editor, MQSeries client, Schema, XMLSpear, XML Tree Editor, binary plist editor,property list editor, real-time validation, free download, best free XML editor

eXtyles is the premier integrated suite of editorial and XML tools for Microsoft Word

Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.