PDF24/PDF24-Online-PDF-Tools — reverse-engineered prompt

Build me a free online PDF tools website similar in spirit to PDF24. I want a simple page where normal users can choose common PDF jobs, upload a file, see clear progress, and download the finished PDF without needing an account.

Start with the most useful basics, merge PDFs, split pages, compress a PDF, convert images to PDF, and extract pages. Keep the design clean, friendly, and fast, with big cards for each tool, drag and drop upload, helpful error messages, and a mobile friendly layout.

Make it feel trustworthy and lightweight, because people may be uploading important documents. If a tool can run in the browser, do that. If it needs a small backend, set it up in the simplest way and document how to run it locally.

Please build the full working app, not just mockups, and look up current docs online if you need to.