LightPDF

LightPDF is a free online service designed for PDF users to convert and manage PDF files. It supports converting PDF to other formats including word, PNG, JPG, etc. It also provides many kinds of PDF tools which can be used to merge, split, sign, unlock, protect PDF and so on.

It has a very simple user interface. Just upload your files by dragging and dropping your file onto it or by clicking the Browse button, wait for the process and then download the converted files right away. LightPDF now works well on nearly all kinds of the platforms such as Windows, Mac, iOS and Android.