Fiddler is one of the best tools to debug your web application. This tool will help you understand the input and output received by your web services, as well as the traffic on your application server. The best thing about Fiddler is that it easily captures all web services that failed and shows the response you received. It also helps you understand which services are triggered when any event object is clicked. This tool is open source, and anyone can download and check it. Review collected by and hosted on G2.com.
When your Fiddler starts capturing the service, your mail service Outlook won't be able to send emails. Also, it is not that user-friendly. Review collected by and hosted on G2.com.
