Convenient, Affordable, Online PDF Editing & Mgmt Tool I use PDFfiller on a regular basis. The enhanced security options, including the ability to email a PDF to someone and that automatically includes a 'security code' for retrieval of the document gives me a sense of security since the actual document is not attached to the email, which could be intercepted if someone hacked into your mail server. I also use the merging tools, allowing me to combine multiple PDF's into one file, move pages, etc. It helps me to better organize my PDF libraries. Considering the other options of using a very high-priced service/product (Acrobat), PDFfiller is, in my opinion, a much better tool. I've been using 'PDFfiller', for the last 2 years. The editing tools available are great, including filling out forms, editing text, adding comments and signatures, makes it a very convenient to import and work with documents on-the-go. The ability to import/export to/from cloud-based sources as well as drag & drop. Import options makes things much easier in-terns of document management Honestly, there haven't been any tasks that I typically need to with PDF editing, etc. that PDFfiller already provide.