PDF stands for Portable Document Format. It's the format people reach for when a document needs to look identical no matter who opens it or where. Here's why it became the standard.
Looks the same everywhere
A PDF embeds its fonts, layout, and images so it renders identically on any device. Unlike a word processor file that can shift depending on the software, a PDF is fixed — what you send is exactly what they see.
Text, images, and vectors together
A PDF can hold selectable text, photographs, and crisp vector graphics in one file. That mix is why understanding compression matters — text and vectors stay sharp, while images are where size lives.
Why it's everywhere
Its consistency, broad support, and ability to be secured (passwords) and signed make it the default for forms, contracts, statements, and official documents worldwide.