PDF (Portable Document Format) is a versatile electronic document format. It was initiated by Adobe and was originally intended for electronic presentation of printed materials. Hence, the tasks of this format follow - storing information about the color scheme and the arrangement of elements, as well as ensuring identical output on different monitors and printers. PDF documents can be opened using the free version of Adobe Reader or a web plug-in that is available for most Internet browsers. In some browsers, in particular, in Google Chrome, this format is supported even without the plugin installed. You can edit PDF files using the paid version of Adobe Reader. Also, there are a huge number of programs for both opening and working with this format, and for converting to other formats.
The DOCX format is an updated doc extension that appeared in the first Microsoft Word editor. The program provides text formatting tools, styles and working with images. Document information is stored in a compressed XML archive. DOCX is an archive file weighing no more than 10 kilobytes, which can be unpacked by a third-party program. This format is a modernized version of the well-known DOC format. A significant difference was the low weight while maintaining all the original image parameters. You can open the file using any Office text editor you are used to working with. The main thing is that the text editor supports the format you need and is no older than 2007. Under pressure from the growing competition of open source and its rival open document format (ODF), Microsoft decided to introduce an open standard in the early 2000s. This led to the development of the DOCX file format.