Most of the important documents are created in PDF format if you want to watermark your PDF files, watermark images is a free online tool that will help you to watermark your PDF files. It is very simple and no sign up is required fro using watermark images.
For water marking files, simply upload your PDF files into watermark images and type your “watermark text” then after click “watermark PDF” button. Here you can download your PDF file with watermark. You can completely customize your watermark with regards to font color, size, position of watermark etc. watermark images watermark only files upto 10MB.