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Alzip 1.4 Release
Alzip 1.4 Review
Alzip 1.4 Download

7-Zip is a file archiver with a high compression ratio.

Download 7-Zip 19.00 (2019-02-21) for Windows:

Link	Type	Windows	Size
Download	.exe	64-bit x64	1.4 MB
Download	.exe	32-bit x86	1.2 MB

Download 7-Zip 21.03 beta (2021-07-20) for Windows:

Link	Type	Windows	Size
Download	.exe	64-bit x64	1.4 MB
Download	.exe	32-bit x86	1.2 MB
Download	.exe	64-bit ARM64	1.5 MB

License

7-Zip is free software with open source. The most of the code is under the GNU LGPL license. Some parts of the code are under the BSD 3-clause License. Also there is unRAR license restriction for some parts of the code. Read 7-Zip License information.

You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip.

The main features of 7-Zip

High compression ratio in 7z format with LZMA and LZMA2 compression
Supported formats:
- Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
- Unpacking only: 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.
For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
Strong AES-256 encryption in 7z and ZIP formats
Self-extracting capability for 7z format
Integration with Windows Shell
Powerful File Manager
Powerful command line version
Plugin for FAR Manager
Localizations for 87 languages

7-Zip works in Windows 10 / 8 / 7 / Vista / XP / 2019 / 2016 / 2012 / 2008 / 2003 / 2000.

p7zip - the port of the command line version of 7-Zip to Linux/Posix.

On 7-Zip's SourceForge Page you can find a forum, bug reports, and feature request systems.

Compression ratio

We compared 7-Zip with WinRAR 5.20.

FILE SETS: Mozilla Firefox 34.0.5 for Windows and Google Earth 6.2.2.6613 for Windows.

Archiver	Mozilla Firefox		Google Earth
	65 files 85 280 391 bytes		483 files 110 700 519 bytes
	Compressed size	Ratio	Compressed size	Ratio
7-Zip 9.35 -mx	39 357 375	100%	15 964 369	100%
WinRAR 5.20 -m5 -s -ma5 -md128m	41 789 543	106%	17 035 432	107%

Compression ratio results are very dependent upon the data used for the tests. Usually, 7-Zip compresses to 7z format 30-70% better than to zip format. And 7-Zip compresses to zip format 2-10% better than most of other zip compatible programs.

Data corruption can happen to anyone on any computer at any time. You never know if your important files are being placed on bad sectors of a hard drive or is on damaged optical media. This will cause the file to become incomplete and even unreadable.

The same thing can happen for a ZIP file where multiple files are compressed into one and all it needs is just one corrupted bit to prevent some file archivers opening and extracting the file. An example when trying to open a corrupted Zip archive from Windows Explorer is an error box popping up.

“Windows cannot open the folder. The Compressed (zipped) Folder ‘C:Pathtofile.zip’ is invalid”.

Although Windows has supported creating and extracting Zip files without third party software for decades, it is not a robust solution.

If you are experiencing problems in extracting a Zip file, there are some tools that can help you access it to the point where data can be recovered. Here we will list 8 programs to repair or open the corrupted Zip file so you can extract it.

We’ll spill the tools into two categories; those that are standalone Zip repair tools and those that are part of archiving software.

Standalone Zip Repair Tools

These are standalone tools dedicated to recovering the data from corrupted Zip archives.

1. DiskInternals ZIP Repair

DiskInternals is a company that specializes in data recovery and they’ve released ZIP Repair as freeware. It only takes a few clicks to repair the corrupted archive file through the user-friendly wizard. Simply select the corrupted file to recover, the location to save the repaired file and the program shows you the list of files that can be recovered. The program dates back to 2007 but still works fine in the latest Windows 10.

2. Zip2Fix

Zip2Fix recovers files from damaged Zip archives by extracting the good ones and then zipping them back to a new archive file with _ZFX appended onto the file name. Usage is simple, run the program and click on the Open button to locate the damaged Zip/SFX file. Zip2Fix will automatically start scanning for the good files available to repack, then reZip them. The program is portable and doesn’t require installation.

3. DataNumen Zip Repair / DataNumen Archive Repair

Although this program is free to use, it does pop up a nag window on launch and again when you press Start to begin the recovery process. All you have to do is browse for the Zip or use the included search feature and press Start Repair. The files are extracted to the destination folder. A useful feature is the Batch Repair which allows you to add and try to recover data from several damaged archives at once.

Besides Zip Repair, DataNumen also has similar recovery tools for RAR, CAB and TAR archives. All four of these tools can be accessed from the same interface with DataNumen Archive Repair.

Object Fix Zip is an old tool we’ve previously mentioned that is dedicated to repairing Zip files. However, it was last updated in 2008 and kept popping up errors during testing and recovered nothing. The tool is free to use so obviously it doesn’t hurt to try Object Fix Zip if you are having trouble recovering your archive.

Archivers With Built In Zip Repair Or Extract Functions

Some file archiving software comes with a built-in tool to repair corrupted ZIP files. The options are usually hidden away in sub menus and aren’t always obvious to end users. Although some of the below archivers are shareware, they can still be used in trial mode while trying to repair your damaged archive.

4. PowerArchiver

The PowerArchiver repair Zip window can be opened from the Tools menu/ribbon or just press Ctrl+R (in Classic mode). The Repair Zip Archive dialog box will open and you can click on the folder icon to browse for the corrupted Zip file that you want to repair. Click the Start button to start fixing. The fixed Zip file will be saved under the same file name with an additional _PAFixed.

5. WinRAR

WinRAR is one of the oldest archivers around and has included a repair option for years. It is able to repair Zip and RAR format archive

Alzip 1.4