The structure or encoding of a file that determines how data is stored and what program can open it (e.g., .txt, .pdf, .jpg). Each file type serves specific purposes, from text documents to multimedia content.

File formats like PDFs or JPEGs dictate how data is stored and shared. Understanding which formats to use ensures that files can be easily opened, edited, or shared across different platforms. Choosing the right format can also make sure content is compatible with assistive technologies, ensuring that everyone can access and use the information without barriers.