Coupling measurement in object-oriented software is becoming an important area day by day from the software quality evaluation point of view. Coupling is an interdependence relationship between classes (modules) of object-oriented software. The coupling measurement helps to maintain dependency degree between modules of object-oriented software. The moderate coupling values result in quality software. Ultimately quality software retains moderate range of values of software quality attributes such as complexity, efficiency, reusability, maintainability, understandability, flexibility, portability, interoperability, etc. This paper proposes a web based tool for measuring coupling in object-oriented Java software. The idea of a web based tool is to deploy a software coupling tool on intranet or cloud to give access to the prescribed users. The tool can be used online to compute coupling and the resulting data of the tool can be sent/received via the public network. The detailed architecture and components of the tool are described in the paper. The tool is most secured for input processing. The Java and Android projects are evaluated using the tool, the coupling values of Java and Android projects are compared in the results and discussion section of the paper. The Advantages of using the web based tool are also described in the paper. Seven coupling metrics are used from the literature to compute their values using web based tool proposed in this paper. Percentage coupling values of seven coupling metrics are computed for Java and Android projects. The percentage range of coupling values computed in the paper using web based tool is compared with standard range of coupling values described in the literature. The results obtained using web based tool gives us coupling values of Java and Android projects. The coupling values obtained using web based tool proposed in the paper are compared with standard coupling values described in the literature. It is found that the values obtained using the web based tool, are within the standard range of coupling values described in the literature. It means the web based tool proposed in this paper calculates correct coupling values of any object-oriented Java code.