If you have Adobe Acrobat, you can use its built-in watermark feature to add a watermark to a PDF file you're editing. Go to the "Document" menu, click "Watermark" and then click "Add." ...

Readdle's Documents app is a popular file manager app with ... As with other browsers, you can add bookmarks, share the webpage, and save the webpage as a PDF. While the developers were very ...

split the PDF, edit it, convert it into an alternative file format such as a JPEG or Word file, and to add a comment.

Generally, free online editors will let you add text and comments, merge and split documents, and convert files to and from PDF. With rare exception, however, they won’t let you edit existing ...

You can choose from 44 tools to create or convert PDF files. It's also easy to rearrange pages within a document, add watermarks, protect PDF files with passcodes, edit metadata within a PDF file ...