What is a file format?

Answer 1

A file format is the way information is saved and organized in a computer file. It tells the computer how to open and read the data inside the file. Different types of files use different formats, for example, .jpg for images, .mp4 for videos, and .docx for documents. Choosing the right format is important so the file works properly with the right apps. Some formats are also better for quality or size, depending on what you need.

Answer 2

A file format is a particular way to encode information for storage in a computer file.

There will usually be a suffix at the end of a file to tell you what kind of file format it is- for images, .jpg, .png, .gif, etc.

Some video file format types are- .wmv, .mp4 (.mpg4), .flv...

If you don't see a suffix like that at the end of your file then right click and hit properties, and it should tell you in the file description.