We have covered 2 free online tools and 4 free software to add watermark to PDF in Windows 11/10. These are: Sejda is a free online tool to add a watermark to PDF files. Its free version lets you ...

PDF Architect 8 is a highly customizable Acrobat alternative that doesn’t sacrifice performance for price. PDF Architect is easily the most unique PDF program we’ve come across. It’s offered as a free ...