PDFMergely

PDFMergely is a free suite of privacy-first PDF tools — merge, split, compress, and password-protect PDFs — that run 100% in your browser. Your files never leave your device: there's no upload endpoint at all, so nothing is sent to a server, and the tools even work offline once loaded. Built with Next.js as a static site, using pdf-lib and pdf.js running in web workers via WebAssembly, hosted on Vercel. No accounts, no sign-up, no tracking of your documents.