All you need to know about ZIP files - What is a ZIP file?

A ZIP file is a compressed file format that combines multiple files into one, making the file smaller for easier downloading, storage, and sharing. This article describes what ZIP files are and why they are used in certain situations, as well as basic operations with ZIP files such as how to open a file to view its contents, convert a ZIP file to another archive format, etc.

What is ZIP?

Files with the ZIP file extension are ZIP compressed files and are the most widely used archive format. Like other archive file formats, this is simply a collection of one or more files and/or folders, but compressed into a single file for easier use.

This file format is also commonly used to reduce file size for easier storage or transfer. People can extract ZIP files to access the full original content before compression.

Uses of ZIP files

The most common use of ZIP files is for downloading software. Compressing software programs saves server storage space, reduces download times, and keeps hundreds or thousands of files neatly organized within a single file.

Another benefit of ZIP files can be seen when downloading or sharing dozens of photos. Instead of sending each image individually via email or saving each image from a website, the sender can put all the images into a ZIP file and only need to transfer one file.

Basic ZIP operations

Open and extract the ZIP file.

The easiest way to open a ZIP file is to double-click it and let the computer display the folders and files inside. In most operating systems, including Windows and macOS, ZIP files are handled internally without any additional software.

Although it's the easiest way to open a ZIP file, these archives sometimes contain executable files that can't run properly unless they're extracted first. Or, if there's a file inside the ZIP that people want to save in a different format, they first need to extract that file from the archive.

To do this in Windows, open the ZIP file and select Extract all or Extract (depending on your Windows version) at the top of File Explorer. That folder now contains a copy of the ZIP file's contents, but users can more easily access all the files for use (such as running programs or converting files).

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Create a ZIP file

To create a ZIP file in Windows, right-click the files and/or folders you want to include in the archive, then select Send to > Compressed (zipped) folder . In Windows 11, you will need to select Show more options to see that menu.

To compress files/folders in macOS, right -click on them and select Compress Items from the menu to create an Archive.zip file .

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Convert ZIP files

Files can only be converted to one of the same format. For example, it's not possible to convert a JPG image to an MP3 audio clip, or a ZIP file to PDF or MP4.

ZIP files are simply containers holding compressed versions of the actual files. Therefore, if there are files inside a ZIP file that you want to convert, such as PDF to DOCX or MP3 to AC3, you must first extract the files using one of the methods above, and then convert those extracted files using a file converter.

If you want to convert a ZIP file to another compressed file format such as 7Z or TAR.GZ, you simply need to find a converter that supports those formats.