How to zip files to save space – and what software to use

Photos, videos, presentations – some computer files are so large they are hard to send as attachments. And if you have limited storage space on your computer, large files can cause problems.
Man with afro hairstyle working on laptop at desk in office
Create a compressed file with free zip software – it’s a snap! shows you how to zip files to make them smaller and gives you some recommendations for (free!) software you can use.

What is a ZIP file?

Have you ever wanted to send some photos or a large document as an email attachment, but received an error message that your attachment is too large? Or received a warning on your device that your hard drive is full? One solution is to compress your files. How does this work? Picture stuffing a puffy sleeping bag into a compression sack – the resulting bundle is significantly smaller and easier to pack and carry, but when you arrive at your campsite and pull out the sleeping bag, it puffs back up to its original size. The same applies with zip compression: You create a ZIP folder that functions like a compression sack and you can “stuff” one or several files into a compact bundle of data. Your files are compressed to as little as 12% of their original size, so a 100 MB file can be squeezed down to as small as 12 MB – well within the attachment limit of almost any email program. On the other end, your recipient unpacks the compressed file, which restores it to its original size with no loss of quality. This process is called “zipping” and “unzipping.”

How to zip a file

If you use a Windows or Mac computer, you already have the tools you need to zip or unzip files. The process is easy and only takes a few clicks. For example, on your Windows computer go to your Explorer and select one or several files that you want to compress. Now right-click to open the context menu, and click on Send to > Compressed (zipped) folder. A ZIP folder with the same name as your file will appear in the same location.
Screenshot of context menu in Windows Explorer
In just two clicks, you can compress files into a ZIP folder

The same applies to macOS. Simply go to your Finder and select the file(s) that you want to zip. Open the context menu with a right click, then click Compress objects. The compressed ZIP file will appear in the same path.

You can now send this ZIP folder just like you would any other email attachment. And the same ZIP tool on the recipient’s computer will allow them to click and open it just like they would any other folder – the contents will automatically be unzipped and return to their original size.

Do I need a special program to zip and unzip files?

If you just want to compress files to make them easier to send, the built-in Windows and Mac zip utilities are fine. However, compared to specialized file compression software, these tools are very limited. For example, they can only read and create ZIP files but there are many other file compression formats. In addition, if you are looking to free up space or back up data on a hard drive by archiving files, you will probably want advanced software that can help you manage these files. Plus the basic utility for Windows and Mac does not support encryption. So if you use it to compress an encrypted file, it will be decrypted when the recipient extracts it.

The best known zip software out there is probably WinZip, which offers a raft of file management features as well as extreme ease of use for compressing, packing and unpacking, opening, and managing files in a variety of formats.It also gives you data security options like encrypting files during compression. Although the recipient of such a file will require a password to open it, they do not have to have WinZip installed to do so. WinZip software is not free, although you can take advantage of a 45-day free trial to thoroughly test the software and decide if it’s right for you.

Free WinZip alternatives

There is also good news for anyone who doesn’t want to pay for advanced zip file opener and compression software. Several excellent open-source and free zip software options are available. The following WinZip alternatives are easy to use and let you create file archives in any format. They all offer a full range of functionality to let you manage your files and archives:
  1. 7-Zip: This is an open source file archiver, which means it is completely free, even for businesses. Widely considered the best free WinZip alternative, 7-Zip is ideal for sharing because it is supported by most other tools. It has a high compression rate, offers encryption, and is available in 60 languages.
  2. Ashampoo ZIP FREE: Can be used to compress and decompress all common formats and create and manage archives. Very intuitive and easy to use, with repair tool for broken ZIP files. ZIP FREE can be fully integrated with Windows Explorer.
  3. PeaZip: Another free file archiver, PeaZip is also open source and can be used with several different operating systems. In addition to common formats like ZIP, it can handle rare types and unpack 180 formats. PeaZip offers encryption and 2FA. It can repair damaged archives, a feature not offered by 7-Zip.
  4. Zipware: This compression software is extremely simple to use and features integrated virus scanning for archives under 32 GB. Its other security features include encryption and a password manager. On the con side, it does not offer a repair tool.
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