File Extensions

 A file extension is a suffix to the name of a computer file that indicates the file's format. It is typically separated from the rest of the filename by a period (.). For example, in the filename "my_document.docx", the file extension is "docx", which indicates that the file is a Microsoft Word document.

File extensions are important because they allow your computer to know what program to use to open a file. When you double-click on a file, your computer will automatically open it in the program that is associated with the file extension.

Here is a list of some common file extensions and their associated file types:

Document:

  • .docx (Microsoft Word)
  • .pdf (Portable Document Format)
  • .txt (plain text)

Image:

  • .jpg (JPEG)
  • .png (Portable Network Graphics)
  • .gif (Graphics Interchange Format)

Audio:

  • .mp3 (MPEG-1 Audio Layer 3)
  • .wav (Waveform Audio File Format)
  • .ogg (Ogg Vorbis)

Video:

  • .mp4 (Moving Picture Experts Group Part 4)
  • .mov (QuickTime Movie File Format)
  • .avi (Audio Video Interleave)

Executable:

  • .exe (Windows)
  • .dmg (macOS)
  • .app (macOS)

Compressed archive:

  • .zip
  • .rar
  • .7z

This is just a small sample of the many different file extensions that are in use today. For a more comprehensive list, you can search online or consult the documentation for your operating system.

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