Sejda is a free online tool to add a watermark to PDF files. Its free version lets you upload a PDF file with up to 200 pages or 50 MB in size. Also, you can perform up to 3 tasks per hour.

To get started, head to Adobe’s online editor, click the Edit PDF button, then upload your file from your device or cloud ...

We tested features like text recognition (when supported) and we tried making changes to text, replacing and adding images and adding annotations. When it comes to free PDF editors, we make note ...