.ZUL File Extension
What is a ZUL file?
Web file created in the ZK User Interface Markup Language (ZUML), an XML-based language supported by Ajax technology and Java classes; contains definitions for user interface elements as well as zscript code.
More Information
ZUL files are used to create rich Web-based user interfaces. Their contents are first parsed on a Java-based Web server, such as Apache Tomcat, and then sent to the requesting client Web browser.
Conceptually, ZUL files are similar to .JSP files.
Programs that open ZUL files
Windows
Mac
Included with OS
Free
Linux
Free