What is a WEBTEST File Type?
Visual Studio uses web tests to simulate how a user interacts with a website. This is done on sites that are under development, not on sites that are online.
The WEBTEST files are usually created by Visual Studio but can also be created during export of' events from Fiddler, a web debugging proxy. You can open the WEBTEST file with web tool Test Editor, which is included in Visual Studio.
What is a Default WEBTEST File Name?
WebTest1.webtest - Generated automatically when creating a Visual Studio project.