File extensions help us identify the nature of a file at a glance. They can denote anything from images to documents, audio files, video files, and more. There are more than 600 file extensions known today, each representing different data formats. Here we will explore some general formats and ways to handle such files.

PNG Files

PNG, or 'Portable Network Graphics', is an example of an image file format. It is often used when you need to save an image with a transparent background. You can open these files using built-in Operating System(OS) image viewers or with software like Adobe Photoshop. You can also open these files using a web browser. Photoshop is popular because it offers extensive editing features.

MP3 Files

MP3, short for 'MPEG Audio Layer-3', is an audio file format. It's commonly used for storing digital audio. Most media players like VLC media player, Apple iTunes, or even web browsers can open and play these files.

Unexpected File Extensions

If you find a file with an extension you don't recognize, proceed with caution. It could be an unfamiliar data file or could potentially contain malware. An unknown file extension may, generally, be handled in the following ways:

• Use a File Viewer/Universal File Viewer
• Convert it to another format using a file converter

600 File Important Information

File extensions are crucial because they inform the program hardware and software of the file's content type. While there are over 600 file formats, not all of them are frequently used. For all known file extensions and their associated programs, you can visit this comprehensive guide at Fileinfo.com. Always remember: when you come across an unknown file format, use caution and avoid opening it unless you are sure of its content.