PDF Editor Hub

PDF Editor Hub is a free online PDF editor that works in the browser. You can change the original text of a PDF, add text and images, white out or highlight, fill in forms, sign, merge, rotate, delete pages, and add or remove a password. There is no signup and no watermark. Files are processed on your own device and are never uploaded to a server, so private documents stay private.
The site also has ready-to-fill pages for about 150 official forms from 11 countries, such as the US W-9, W-4, I-9 and N-400, UK SA100 and P87, Canadian TD1 and T2125, German Kindergeld forms, French Cerfa forms and the Dubai tenancy contract. Open the form, fill it in online and download the finished PDF.