In this guide we will show you how to compress a file or folder into a .zip file using 7-zip. This is recommended before transferring a file over the internet, so that it is not corrupted in-transit.

You must have 7-zip installed before attempting to follow this guide. 7-Zip is a free open-source software; download 7-zip here.

How to Compress a File

  1. Open the 7-Zip File Manager.
  2. Navigate to the file you want to compress, and click it, then click the Add button.
    adding a file to be compressed in 7-zip
  3. The Add to Archive window will pop up, make sure the Archive format is set to zip, and click the OK button to proceed.
    compressing a folder into a zip file in 7-zip
    The file will be compressed into a zip file, that will be located in the same location as the original file.
    view of the compressed and uncompressed file on desktop

Congratulations, now you know how to compress a file into a .zip format using 7-Zip!
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n/a Points
2014-07-24 10:35 am
After the simple explanation, if you added more detail of what each feature does and how it affects the speed of your Zip operation, then it would greatly help beginners.
Staff
8,247 Points
2014-08-01 9:36 am
Hello Anthony,

Thank you for your helpful suggestion. I will hopefully write more detailed guides on using 7-Zip.

If you have any further questions, feel free to post them below.
Thank you,

-John-Paul
n/a Points
2014-07-30 11:50 am
Very helpful - first time I've used 7zip and this was just what I needed.
n/a Points
2014-08-17 3:24 pm

I follow the steps in the above helf file, and this creates  a .zip file as you say.HOWEVER, I want a compressed file, not just a zipped file - the .zip file i create using the above method is exactly the same size as the original, which for me defeats the purpose

Staff
8,247 Points
2014-08-18 12:40 pm
Hello ConfusedUK,

Thank you for contacting us regarding File Compression, I understand your frustration.

The amount of compression can be increased, but also depends on the files you are zipping.

Increase the Compression Level in 7-Zip:

  1. In Step 3 of the above guide, click the box next to Compression level, and choose Ultra.

Reasons a Compressed file is the same size:

Some file formats cannot be further compressed. For example jpeg file are already compressed and will not zip much smaller. In this case you can optimize the images by size, meta tags, etc. Which reduces the file sizes.


If you have any further questions, feel free to post them below.
Thank you,

-John-Paul

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