What Is a ZIP File?

How to open, edit and convert ZIP files

What there is to know

  • A ZIP file is a compressed archive file.
  • Double-click to open one in Windows or macOS, or use 7-Zip.
  • Convert ZIP to TAR, 7Z, CAB, LZH, etc., with Zamzar.

This article describes what ZIP files are and why they are used in certain situations. We’ll also cover how to open one to see its contents and how to convert the files inside to a different format, or convert the ZIP itself to another archive format like TAR.GZ or RAR.

What is a ZIP file?

A file with the ZIP file extension is a ZIP compressed file and is the most widely used archive format you will encounter. Like other archive file formats, this one is simply a collection of one or more files and/or folders, but is compressed into a single file for ease of transport and compression.

Uses of ZIP Files

The most common use of ZIP files is for downloading software. Zipper software saves storage space on the server, reduces the time it takes to download it to your computer, and keeps the hundreds or thousands of files neatly organized in a single file.

Another example can be seen when uploading or sharing dozens of photos. Instead of emailing each image individually or saving each image one by one from a website, the sender can place the files in a ZIP archive so that only one file needs to be transferred.

How to Compress Files in a ZIP Archive on Windows

How to open a ZIP file

The easiest way to open a ZIP file is to double-click it and let your computer show you the folders and files it contains. In most operating systems, including Windows and macOS, ZIP files are handled internally, without the need for additional software.

Screenshot showing an open ZIP file in Windows 10

Other Tools and Capabilities

However, there is a lot compression/decompression tools that can be used to open (and create!) ZIP files. There’s a reason they’re commonly referred to as compression/decompression tools!

Including Windows, just about any program that relax ZIP files also have the ability to Zip*: French them; in other words, they can compress one or more files in ZIP format. Some can also encrypt and password protect them. If we had to recommend one or two, it would be PeaZip and 7-Zip, two excellent and completely free programs that support the ZIP format.

Online and mobile options

If you prefer not to use a program to open the archive, many online services also support the format. Services like Files2Zip.com, B1 Online Archiver and ezyZip allow you to simply upload your ZIP file to see everything inside, then you can upload one or more files individually.

We recommend using an online ZIP opener only if the file is small. Downloading a large archive file and managing it online will probably take you more time and effort than simply downloading and installing an offline tool like 7-Zip.

You can also open one on most mobile devices. iOS users can install iZip for free, and Android users should be able to work with ZIP files through B1 Archiver or 7Zipper.

Best Zip File Extractors for Android

Opening Other Types of ZIP Files

ZIPX files are extended Zip files created and opened with WinZip version 12.1 and later, as well as PeaZip and other similar archiving software.

If you need help opening a .ZIP.CPGZ file, see What is a CPGZ file?.

How to convert a ZIP file

Files can only be converted to something of a similar format. For example, you cannot convert a JPG image to MP4 video, nor can you convert a ZIP file to PDF or MP3.

If this is confusing, remember that ZIP files are just containers that hold compressed versions of the actual file(s) you’re looking for. So if there are files inside a ZIP file that you wish to convert, such as a PDF to DOCX or MP3 to AC3, you must first extract the files using one of the methods described in the section above, and so convert those extracted files with a file converter.

That said, converting between archive formats is fair game (see below), as is how you can convert between image formats. So if you want to convert ZIP to 7Z or TAR.GZ, you just need to find a converter that supports these formats.

Convert files

Recommended converters

Since ZIP is an archive format, you can easily convert one to RAR, 7Z, ISO, TGZ, TAR or any other compressed file in two ways depending on the size:

  • If it is small, we strongly recommend using ConvertFiles or Online-Convert.com. These work just like the online ZIP openers already described, meaning you’ll need to upload the file to the website before you can convert it.
  • To convert larger ZIP files that would take much longer to upload to a website, use Zip2ISO for converting to ISO, or IZarc to convert to many different archive formats.

If none of these methods work, try one of these free file converters for occasionally used formats to convert the file to another file format. The one we particularly like is Zamzar, which can convert to 7Z, TAR.BZ2, YZ1, and other archive formats.

More information about ZIP files

Below are related details that appear when talking about this format.

Password recovery for ZIP files

If you password protected the file, but then forgot the password, you can use a password cracker to remove it to regain access to your files. A free program that uses brute force to remove a ZIP password is ZIP Password Cracker Pro.

ZIP files have ZIP extensions

Some ZIP files may have a filename with a different file extension before the final “zip” extension. Remember that, as with any type of file, it is always the latest expansion which defines what the file is.

For example, Photos.jpg.zip is always a ZIP file because JPG comes before ZIP *: FRENCH. In this example, the archive is probably named that way, so it’s quick and easy to identify that there are JPG images inside the archive.

Backups

Some backup software tools will create file backups in ZIP format so that they are compressed to save space, bundled together for easier retrieval, and contained in a common format so that the backup can be opened even without the backup software. original backup. One such program that does this is COMODO Backup.

Creating a ZIP File

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

Windows 11 send to ZIP menu

To compress files/folders in macOS, right click on it and select Compress items in the menu to make a Archive.zip case.

Size limit

A ZIP file can be as small as 22 bytes and as large as approximately 4 GB. This 4 GB limit applies to both the compressed and uncompressed size of any file inside the archive, as well than the total size of the ZIP file.

ZIP’s creator, Phil Katz’ PKWARE Inc. introduced a new ZIP format called ZIP64 which increases the size limit to 16 EiB (about 18 million TB). See the ZIP file format specification for more details.


More information about What Is a ZIP File?

How to open, edit, and convert ZIP Files

What to Know
A ZIP file is a compressed archive file.
Double-click to open one in Windows or macOS, or use 7-Zip.
Convert ZIP to TAR, 7Z, CAB, LZH, etc., with Zamzar.

This article describes what ZIP files are and why they’re used in some situations. We’ll also look at how to open one to see its contents, and how to convert the files inside to a different format, or convert the ZIP itself to another archive format like TAR.GZ or RAR.

What Is a ZIP File?

A file with the ZIP file extension is a ZIP compressed file and is the most widely used archive format you’ll run into. Like other archive file formats, this one is simply a collection of one or more files and/or folders, but is compressed into a single file for easy transportation and compression.

ZIP File Uses

The most common use for ZIP files is for software downloads. Zipping a software program saves storage space on the server, decreases the time it takes for you to download it to your computer, and keeps the hundreds or thousands of files nicely organized in a single file.

Another example can be seen when downloading or sharing dozens of photos. Instead of sending each image individually over email or saving each image one by one from a website, the sender can put the files in a ZIP archive so that only one file needs to be transferred.

How to Compress Files to a ZIP Archive in Windows

How to Open a ZIP File

The easiest way to open a ZIP file is to double-click it and let your computer show you the folders and files contained inside. In most operating systems, including Windows and macOS, ZIP files are handled internally, without the need for any extra software.

Other Tools and Capabilities

However, there are many compression/decompression tools that can be used to open (and create!) ZIP files. There’s a reason they’re commonly referred to as zip/unzip tools!

Including Windows, just about all programs that unzip ZIP files also have the ability to zip them; in other words, they can compress one or more files into the ZIP format. Some can also encrypt and password protect them. If we had to recommend one or two, it’d be PeaZip and 7-Zip, both excellent and completely free programs that support the ZIP format.

Online and Mobile Options

If you’d rather not use a program to open the archive, lots of online services support the format, too. Services like Files2Zip.com, B1 Online Archiver, and ezyZip let you simply upload your ZIP file to see everything inside, and then you can download one or more of the files individually.

We recommend using an online ZIP opener only if the file is on the small side. Uploading a large archive file and managing it online will probably take you more time and energy than just downloading and installing an offline tool like 7-Zip.

You can also open one on most mobile devices. iOS users can install iZip for free, and Android users should be able to work with ZIP files via B1 Archiver or 7Zipper.

The Best Zip File Extractors for Android
Opening Other Kinds of ZIP Files

ZIPX files are Extended Zip files that are created by and opened with WinZip version 12.1 and newer, as well as PeaZip and some other similar archive software.

If you need help opening a .ZIP.CPGZ file, see What Is a CPGZ File?.

How to Convert a ZIP File

Files can only be converted to something of a similar format. For example, you can’t convert a JPG image into an MP4 video, any more than you can convert a ZIP file to PDF or MP3.

If this is confusing, remember that ZIP files are just containers that hold compressed versions of the actual file(s) you’re after. So if there are files inside a ZIP file that you want to convert—like for a PDF to DOCX or MP3 to AC3—you must first extract the files using one of the methods described in the section above, and then convert those extracted files with a file converter.

With that said, converting between archive formats is fair game (see below), just like how you can convert between image formats. So, if you want to convert ZIP to 7Z or TAR.GZ, you just need to find a converter that supports those formats.

Recommended Converters

Since ZIP is an archive format, you can easily convert one to RAR, 7Z, ISO, TGZ, TAR, or any other compressed file, in two ways, depending on size:

If it’s small, we highly recommend using ConvertFiles or Online-Convert.com. These work just like the online ZIP openers already described, which means you’ll need to upload the file to the website before it can be converted.
To convert larger ZIP files that would take much longer to upload to a website, use Zip2ISO to for conversion to ISO, or IZarc to convert it to lots of different archive formats.

If none of those methods work, try one of these Free File Converters for Occasionally Used Formats to convert the file to another file format. The one we particularly like is Zamzar, which can convert to 7Z, TAR.BZ2, YZ1, and other archive formats.

More Information on ZIP Files

Below are related details that come up when talking about this format.

Password Recovery for ZIP Files

If you’ve password protected the file but then forgot the password, you can use a password cracker to remove it to regain access to your files. One free program that uses brute force to remove a ZIP password is ZIP Password Cracker Pro.

ZIP Files Have ZIP Extensions

Some ZIP files may have a file name with a different file extension before the final “zip” extension. Just keep in mind, like with any type of file, it’s always the very last extension that defines what the file is.

For example, Photos.jpg.zip is still a ZIP file because JPG comes before ZIP. In this example, the archive is probably named this way so it’s quick and easy to identify that there are JPG images inside the archive.

Backups

Some backup software tools will create file backups in the ZIP format so that they’re compressed to save space, collected together for easier retrieval, and contained in a common format so that the backup can be opened even without the original backup software. One such program that does this is COMODO Backup.

Creating a ZIP File

To make a ZIP file in Windows, right-click the files and/or folders that should be in the archive and then choose Send to > Compressed (zipped) folder. In Windows 11, you’ll need to select Show more options to see that menu.

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

Size Limitation

A ZIP file can be as small as 22 bytes and as large as around 4 GB. This 4 GB limit applies to both the compressed and uncompressed size of any file inside the archive, as well as to the total size of the ZIP file.

ZIP’s creator Phil Katz’ PKWARE Inc. has introduced a new ZIP format called ZIP64 that raises the size limitation to 16 EiB (around 18 million TB). See the ZIP File Format Specification for more details.

#ZIP #File


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