The amount of digital information is growing every day. Due to its persistence is often used as evidence on judgements. Digital forensics is a science that is intended to found this proofs in order to make a reconstruction of the facts. There are many tools to extract this information. Two well-known user interfaces are En- Case Forensic and Autopsy. Those softwares offer the possibility to see the file system of an image without modifying it (to preserve proof integrity), recover deleted files, generate timelines and even search functions to find clues that helps their cases. However, there are no open-source user-friendly interfaces that can run over Windows, Linux and Max OS. In this project a new software, Img-spy, was created to perform those operations regardless of the operating system. With such a goal, in this project we have built The Sleuth Kit JavaScript wrapper, which provides a JavaScript interface to the widely-use cross-platform open-source Sleuth Kit C library. With such a wrapper, JavaScript can be used to develop new applications for digital forensics analysis. Besides being multi-platform, this project has been targeted to create a user-friendly frame- work for the usual digital forensics' work flow. This obvious purpose is very difficult to achieve because users have different preferences. Then, Img-spy user interface is in- tended to be customizable, giving the option to adjust the size of the interface panels and supporting multiple themes. The results of this project are a good example of how a scalable application can be built using flux-like architecture based on React-Redux packages. Those modern libraries cre- ate a unidirectional data flow that starts with actions that modify the current state of the application and so affect the views of the user interface.