This paper aims to provide an important online leave application system for either a business or an individual organization. This system is an Intranet-based application that may be accessed by any group or department inside an organization. This technology can be used to approve process for leave applications, the crediting of leave on a regular basis and updating of leave related salary report is likewise automated. This paper is to provide a platform where user can not only apply for a leave but also provide various information and updates relating to leave and leave related salary reports. The main highlight of this system is the encryption system used for login credentials. The encryption algorithm used here is AES (Advanced Encryption Standard) encryption system. This paper includes features such as leave approval and denials, leave types, employee details, annual and monthly leave report of employees, approved leaves, leave history, pending leave approval and salary report generators, and more. Leave applications will save paperwork and allow for more efficient record keeping.