klzth is a fast, easy-to-use online PDF merger that lets you combine multiple PDF files directly in your browser. No account, no registration, and no software installation required. Your files are processed locally on your device, so they don't need to be uploaded to a server for merging. Preserve selectable text and original image quality while arranging pages in your preferred order. With optional A4 resizing, no watermarks, and affordable one-time licenses, klzth makes merging PDFs simple, private, and convenient. Three merges are free each month, with paid options available for users who need more. https://www.klzth.com/