What is a PDF file and how to convert it to other formats?

What is a PDF file?
A PDF (Portable Document Format) file is a universal file format developed by Adobe to present documents consistently across devices and platforms. It can include text, images, links, and even interactive elements like forms or signatures.

How to open a PDF file
PDF files can be opened with any web browser or dedicated viewer such as Adobe Acrobat Reader, Foxit Reader, or Preview on macOS. Most mobile devices and modern operating systems support PDF natively.

Why PDF files are used
PDF files are widely used for sharing documents that need to preserve their original layout. They are ideal for contracts, reports, manuals, and official documents, as they look the same on every device and are easy to secure or print.