CredFinder a web-based credibility assessment tool. The main target of this tool is to score tweets credibility in a real time manner. This extension developed to help users assess the credibility of tweets content. The CredFinder algorithm that is presented in this work is thus able to calculate a credibility score of a tweet based on tweet features. Response time on Client-side is extremely fast due to the avoidance of complex operations where the server-side handle the most operations of the system.