I need an online tool that lets a small, pre-approved group log in with a simple username and password, upload an Excel report, and have the system immediately convert it to PDF and email that PDF to a single, fixed recipient. Core requirements • Hosted on a public URL but gated so only whitelisted users with their username / password can get in. • Clean upload page that accepts a standard Excel file, triggers a server-side conversion to PDF, then automatically emails the finished PDF to the designated address. • Minimal interface—just log in, upload, confirmation message. • Basic admin panel or config file where I can: – Add or disable user accounts. – Change the destination email if needed. Deliverables 1. Source code for the web app. 2. Deployment guide for a low-cost cloud host (Heroku, DigitalOcean, or similar). 3. Brief README outlining dependencies and how to add new users. I’m flexible on tech stack as long as the final site is reliable and easy to maintain. A clear, working prototype that meets these essentials is all I need for this phase.