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This is an article on how to compress ZIP files to the smallest size using a Windows or Mac computer. Although the built-in file compression tool on Windows and macOS can compress files quite well, there is no option to add a higher compression level. Fortunately, you can use the free and easy-to-use 7-Zip application on Windows for a variety of options to control the final size of your files. While you can’t use 7-Zip on macOS, you can use the Keka app with similar functionality to achieve similar results. You should note that files that are already compressed, such as MP3, AVI, MPG and JPG files are not smaller than their actual size after being compressed into a ZIP file. [1] X Research Source
Steps
7-Zip Program on Windows
- After downloading the program, simply double-click the installer program and follow the on-screen instructions to install 7-Zip.
- If you want to send the 7z file to someone else, they can extract the file without installing additional software on the Mac. If using Windows, they need to install 7-Zip, WinZip, or an archive program that is compatible with the 7z format.
- To see the size of the compressed ZIP file, you will right-click the .7z or .zip file and select Properties .
Keka Program on macOS
- You need to install special software on Mac to extract 7z files, but Windows users need to install 7-Zip (free).
- Leave the default settings for the rest of the selections to get the highest compression in the shortest amount of time.
- To see the file size, you would click on the file in the Finder, and press Command + I to view the file’s information.
Advice
- If you need to compress a ZIP file in a compressed format, start by reducing the size of the file to be compressed. That means cutting the audio file, or reducing the resolution of the JPG file.
- Both 7-Zip and Keka programs allow to split ZIP or 7z files into smaller files and create larger files.
This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
There are 7 references cited in this article that you can see at the bottom of the page.
This article has been viewed 2,500 times.
This is an article on how to compress ZIP files to the smallest size using a Windows or Mac computer. Although the built-in file compression tool on Windows and macOS can compress files quite well, there is no option to add a higher compression level. Fortunately, you can use the free and easy-to-use 7-Zip application on Windows for a variety of options to control the final size of your files. While you can’t use 7-Zip on macOS, you can use the Keka app with similar functionality to achieve similar results. You should note that files that are already compressed, such as MP3, AVI, MPG and JPG files are not smaller than their actual size after being compressed into a ZIP file. [1] X Research Source
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