With PDFfiller you can choose two ways of working; one free, with the classic restrictions on the amount of files per day, and another one of pay where you can use all the tools without limits of anything.
When you just enter pdffiller draws attention to their environment, where they do not appear the common options of the type "word to pdf" or "pdf to jpeg", but directly asks to find the file with which you want to work. Here is where you find another novelty since you can upload your file, paste the URL where the file is, get it from your mail or request the document from a third party and everything from the same page facilitating the integration of the program to your daily use.
Once you open a file you can see a toolbar that allows you to add add text, add check, insert images, underline words, delete, blackout, and of course, add watermark, making the environment become a text editor and not only in program to change the extension of the files.
from the same page you can send to print, send via mail, share with social networks (fb and google), share the link and of course, save your file as pdf, word, excel or ppt.
If we stop to look at PDFfiller itself it does not contain negative aspects that are so important to correct, it would clearly be great if the whole system could be integrated into your networks and work for free, but it is also understood that the work and investment that made the creators of pdffiller should be rewarded in some way.
totally recommendable If you're looking to convert files to and from pdf, this program works wonders, and if you want to edit some parts of your files, it works pretty well too.
until recently I was using other programs when I had to work with pdf or convert files to pdf, but the truth is that pdffiller has necessary features to become one of my most used programs since within its tools it has a feature that allows blackout in those phrases or data that you do not want to reveal because they are confidential or sensitive, which is particularly useful for me when I have to make some presentations or present documents to external agents and I do not want to reveal all the data.