What this filename?

Common File Extensions for Media and Documents

This table outlines the most frequently encountered file extensions across different media and document categories.

Common File Extensions: A Quick GuideThe portion of a filename that comes after the final dot (.) is called the file extension. 

This helps the operating system identify the file type.

Here are the four common file extensions you listed and what they represent:

.jpg (or .jpeg) This is one of the most common file extensions for Image files. It stands for Joint Photographic Experts Group and is best used for photographs due to its excellent compression.

.png This is another popular Image file extension. It stands for Portable Network Graphics and is favored for logos, graphics, and images that require transparent backgrounds.

.mp3 This extension denotes a compressed Audio file. It is the global standard for digital music and audio recording. 

.mp4 This extension is a container format primarily used for Video files, though it also contains audio data. It is the standard format for streaming video on the internet.

Example Filenames:

If you were to use these extensions in a real file, the full name might look like this: sunset_vacation.jpg, app_logo.png, podcast_episode.mp3, or short_clip.mp4.