What Is...?

What you've always wanted to know about PDF and its related formats (Word: .doc, .docx, .odt and more... Excel: .xls, .xlt and more... images: .jpg, .png and more... . and many others), in this section aimed at solving doubts about the origin, history, operation and peculiarities of this format.

The PDF (Portable Document Format) was launched by Adobe in 1993. Discover everything that surrounds the .pdf format, because... did you know, for example, that this file extension was about to be called "Carousel"? It is a curiosity that few people know about a format that everyone uses on a daily basis.

But that is not all:

What Is PDF/A, And How Is It Different From Conventional PDF?
What Is Metadata?
What Is The Signature In A PDF For?
... and much more!

Solve all these doubts below.

FormatPDF » What Is...?

Guide To The Legal Paper Size In 2023

Around the world, differing standardized legal paper systems are used. Let's see what's legal and where!