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Compressing, or "zipping," files on a computer allows you to send and save them in smaller file sizes. It is especially useful when sending media, like photos and videos. You can learn how to zip a folder on Mac or Windows operating systems (OS). Start zipping files on your computer.

Method 1
Method 1 of 2:

Zipping Files on Windows OS

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  1. You may want to use the "desktop" or a folder in the "documents" section.
  2. This will save space and work if you are planning to send files over email. It will also allow you to keep files together so you don't lose them.
    • Create a new folder on your desktop or in a documents folder by pressing your right mouse button. Select "New Folder" and name it according to your file type or project. Creating and zipping a folder is also useful for data storage, email inbox storage and email transmission times.
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  3. You will usually use a mouse to do this.
  4. A list of options will pop up.
    • If you don't have a right mouse button, hold down "Shift" and "F10" to get the same list of options.
  5. Choose "Compressed Folder." Wait while the folder compresses.
  6. It should say the previous folder's name and a ".zip" file extension name.
    • A person who receives a .zip file must double click on the folder to unzip the file. After completing this, they will be able to access all of the files in the original folder.
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Method 2
Method 2 of 2:

Zipping Files in Mac OS

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  1. Scroll down and click on the option "Compress Folder Name."
    • If you do not have a mouse with a right mouse button, press the "Control" button and the track pad bar at once. Scroll down with your track pad and click on the "Compress" option.
  2. Then, send or store the zipped file. Anyone who receives the file will need to double click on the .zip file to unzip and use it.
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  • Question
    How do I unblock a ZIP file in Gmail?
    wikiHow Staff Editor
    Staff Answer
    This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.
    wikiHow Staff Editor
    Staff Answer
    It may help to ask whoever sent the file to rename it with a different file extension name, such as PNG. That way, Gmail may be less likely to block the file. You could also ask them to send the file over Google Drive instead of directly through Gmail.
  • Question
    How does a ZIP file work?
    wikiHow Staff Editor
    Staff Answer
    This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.
    wikiHow Staff Editor
    Staff Answer
    ZIP files compress files or groups of files by removing redundant data. The program searches your file for repeated information and replaces it with a simple code (such as a short string of numbers to represent a repeated phrase). Once you extract the files, the code is replaced with the original information.
  • Question
    Do ZIP files lose quality?
    wikiHow Staff Editor
    Staff Answer
    This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.
    wikiHow Staff Editor
    Staff Answer
    No, ZIP files are a form of lossless compression. Because the ZIP process simply replaces redundant data with shorter bits of code, the original file can be completely restored based on the code once you extract the file.
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