CareerPen is a specialized AI tool designed to streamline the job application process by automating the creation of personalized cover letters. Leveraging data from the user's LinkedIn profile, CareerPen generates tailored cover letters matched to specific job advertisements. The tool focuses on highlighting the user's relevant skills and experiences in relation to the job requirements, thereby enhancing the efficiency and effectiveness of the job application process. CareerPen operates through a browser extension, attaching a button to LinkedIn job posts for easy and immediate cover letter creation. It also offers an option to utilize the service from a dashboard for job posts outside of LinkedIn. Additionally, CareerPens browser extension is secure and open source, and maintains a strong commitment to user data privacy, storing only public LinkedIn profile data and never selling user data. Moreover, while primarily aimed at the LinkedIn platform, CareerPen is flexible and can also generate cover letters for job posts outside LinkedIn. Ongoing developments for this tool include features like generating responses to HR survey questions during the LinkedIn 'Quick Apply' process.