What is PDF?
PDFs run your world. You know you use PDFs to make your most important work happen. That’s why we invented the Portable Document Format (PDF), to present and exchange documents reliably — independent of software, hardware, or operating system.
The PDF is now an open standard, maintained by the International Organization for Standardization (ISO). PDF documents can contain links and buttons, form fields, audio, video, and business logic. They can be signed electronically, and you can easily view PDF files on Windows or Mac OS using the free Acrobat Reader DC software.
PDFs are all about security.
When you work with electronic documents, it’s important to make protection a part of your routine. You can password-protect your PDF files to prevent others from copying and editing. Redact them to permanently delete sensitive information. And even find and remove hidden data.