Every time I needed to compress one PDF, the website wanted my file, then an account, then a watermark on the result. I finally snapped and built my own thing. It is called OpenFile, 360+ file tools (PDF, images, video, audio) that run fully inside the browser tab, so nothing gets uploaded. It is free and MIT licensed. If you are tired of the same upload sites, the code is on github, aniruddhaadak80 OpenFile. Tell me which tool you want next.