The best free file compression software
The best free WinZip alternative
First released in 1991, WinZip is the best-known software for creating and opening compressed file archives. It's a great tool, but at £31.14 (US$35.94, AU$47.94) it's rather expensive - especially when there are so many excellent free alternatives.
Windows (from XP onwards) has a built-in compression tool, accessed by right-clicking one or more folders/files, and selecting 'Send to > Compressed (zipped) folder'. This is fine for very occasional use, but is very limited. It can only read and create ZIP files (there are dozens of other formats), it doesn't let you create multiple volumes of a particular size, can't repair damaged archives, and doesn't support encryption. In fact, if you use it to compress an encrypted file, it will be decrypted when extracted.
It's therefore a good idea to have a different WinZip alternative on hand for compressing and opening file archives, and we've picked out the best. Have we missed your preferred tool? Let us know in the comments below.
1. 7-Zip
The ultimate lightweight compression tool - no frills and no strings attached
7-Zip is open source, meaning it's completely free, even for commercial use. It's only 1MB in size, and is available as a portable version that can be run directly from a USB stick.
7-Zip isn't the most attractive WinZip alternative around, but it's so well designed that you won't miss the slick interfaces of its paid-for equivalents. You can locate files to be archived using a simple Windows Explorer-style file tree, or drag and drop them into the main window.
It can pack and unpack 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM archives, and unpack AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR and Z.
Its own 7z format is designed for high compression, and is supported by almost all file achiving tools - both paid-for and free - making it an ideal choice for sharing.
You can apply password protection to packaged archives and split them into volumes, which is handy for sharing particularly large archives. The only key feature it's missing is the ability to repair damaged archives.
2. PeaZip
Another excellent open source archiver. Larger than 7-Zip, but with more features
PeaZip is another open source WinZip alternative, but with a few more features in a considerably larger package (around 10MB compared to 7-Zip's 1MB).
PeaZip's standard installation will make file associations and add context menu options automatically, which you might not want if you're trying it for the first time. Select 'Custom' if you want to make your own choices. Alternatively, you can use the 1.8MB portable version, which runs without being installed and won't make changes to your PC.
PeaZip can pack and unpack to 7z, ARC/WRC, SFX, BZ2, GZ, PAQ/LPAQ/ZPAQ, PEA, QUAD/BALZ/BCM, SPLIT, TAR, UPX, WIM and ZIP. It can also unpack ACE, ARJ, CAB, CHM, compound files (eg MSI, DOC, PPT, XLS), CPIO, DEB, EAR, ISO, JAR, LZMA, LZH, NSIS installers, OpenOffice's OpenDocument, PET/PUP, PAK/PK3/PK4, RAR, RPM, SMZIP, U3P, WAR, XPI, Z and ZIPX.
PEA, its own format, prioritises security over compression, with optional integrity check and authenticated encryption. Unlike 7-Zip, it can repair damaged archives.
Its handy extra features include the ability to convert archive formats and test archives for errors. It can't batch compress or watermark images as some of the other tools here can, but can rotate and crop them for you.
A portable version of PeaZip is also available.
3. Zipware
Incredibly user-friendly. An excellent choice if you're new to file compression
WinZip alternative Zipware is wonderfully simple to use - simply choose 'New' or 'Open', choose your source file or archive, tweak a few optional settings and you're done.
It's free to use, but if you decide to stick with it, the website invites you to make a donation to support its development. The software itself doesn't nag you for money though.
Its standout feature is integrated virus-scanning: if an archive is under 32GB, you can check it for threats with VirusTotal. This is unlikely to be of interest to power users, but is a helpful addition for anyone who's unsure about extracting downloaded archives (or who knows someone with a tendency to accidentally open such things).
Zipware can read ZIP, ZIPX, 7Z, RAR, RAR5, ISO, VHD, MSI, GZIP, BZIP2, TAR, CPIO, DEB, DMG, LZH, LZMA, LZMA2, PPMd, NSIS, RPM, UDF, WIM, XAR, XPI, CBR, CBZ, XZ and Z archives. It can create ZIP, 7Z and EXE archives.
4. Ashampoo Zip Free
Optimized for touch, but promotion of paid-for features can be overbearing
Before you can install Ashampoo Zip Free (or any of the company's software), you must register for a free account using your email address. You'll be sent a free activation key, then prompted to create a profile including your name and date of birth, but you can skip this step.
Watch out for potentially unwanted programs when running the installer; we ended up with an unwanted price comparison tool on our test PC, which wasn't picked up by Unchecky.
Ashampoo Zip Free's main features are presented as Windows-style tiles, but here the free program's limitations start to show, with paid-for features like encryption and archive format conversion (which are included with open source tools) locked out until you open your wallet.
This free WinZip alternative redeems itself with a very clear interface, which has an optional touch mode with larger, tap-friendly icons. All of the key features are immediately obvious rather than hidden behind ribbons and menus. Interestingly, it also gives previews of files before you extract an archive. This happens automatically, so don't be alarmed if a music file begins playing on mouseover.
You aren't given many choices when creating archives; most of the interesting features come into play when you're unpacking and sharing.
5. WinRAR (trial)
The only way to create RAR archives, WinRAR is designed for power users
WinRAR is another premium tool with a history extending back to the early 90s, making it a useful point of comparison for today's free alternatives.
After the 40-day free trial period, a single-user WinRAR licence costs €29.95 (about £23.24, US$33.54, AU$46.52).
The proprietary RAR format can only be created using WinRAR, but can be extracted by almost any other WinZip alternative. As with 7z, this makes it a good choice for file-sharing. RAR archives are also typically smaller than their ZIP equivalents.
WInRAR can unpack CAB, ARJ, LZH, TAR, GZ/TAR.GZ, BZ2/TAR.BZ2, ACE, UUE, JAR, ISO, 7Z, XZ and Z archives, and compress in RAR and ZIP formats.
WinRAR's appearance has remained largely unchanged over the years, with command line and simple graphical interfaces (custom themes are available, with an equally old-school feel). That doesn't matter though; this is a tool designed for power users.
Its efficiency is particularly apparent when faced with larger tasks, which it handles with aplomb. You can even set it to turn off your PC once it's finished creating mammoth archives (or dozens of smaller ones).
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