While GPS (Global Positioning System) has been in daily life in form a navigation tool for nearly three decades, its applications have been matured to provide valuable information for a wide range of areas requiring very high precision such as geophysical and seismological studies, earthquake prediction, deformation monitoring. High-precision GPS data processing requires incorporating elaborate models of numerous physical phenomena such as ocean loading, solid earth tides, troposphere and ionosphere modeling, water-vapor modeling, robust phase ambiguity resolution. Commercial software has limited applications and often lacks such fine and complex modeling capabilities which are usually developed and applied in research institutes and universities. The academic software developed in universities and research institutes are generally highly complicated lacking a user-friendly environment and an easy learning curve. On the other hand, today’s engineering requirements is constantly increasing and more precise GPS data processing methods are needed. In this study, we present a web-based approach to high precision GPS data processing which integrates the complex data modeling methods in the server side with the user-friendly interface in the client side. A complete application was also given in details.