Usual pack formats ZIP and RAR unpacked 7zip

The free 7zip is used for archiving, that is to say the compact design of data, whether for transfer or storage, where they should occupy as little space as possible. If you have, for example, a collection of data or files, you can minimize the size by a packing process. 

The freeware supports the well-known archive formats RAR and ZIP, but can also offer its own, powerful format with 7z.7-Zip is a free pack program, which is both able to deal with the usual archive formats like RAR or ZIP as Also an own archive format named 7z. RAR archives can unpack the freeware, but not pack. Apart from 7z and ZIP, 7-Zip is still able to use a number of other archive formats for compression: XZ, BZIP2, GZIP, TAR and WIM. 

The 7z format is particularly characterized by a high compression rate. Regardless of the archive format used, 7-Zip provides secure 256-bit encryption. By integrating with the Windows context menu and its built-in file manager, the program makes it much easier to create and unpack archives. Also with 7-Zip you have the possibility to create self-extracting archives.

With 7zip it is possible to store compressed and archived data in several parts, called volumes. The size can be determined and dynamically determined. This process is particularly suitable for storing data carriers with limited storage capacity or sending them via messenger or email programs.

Executable files (.exe) that are packed in an archive can be opened directly with 7zip without unpacking them beforehand. Many self-extracting archives are also useful for this purpose.

Such self-extracting archives can also be created with 7zip itself. However, you can not use volumes because the operation works only for archives in a file.
If two panels are open, 7zip can also be used as a simple file manager in the style of, for example, Norton Commander.

Archives with corrupted file name information can be opened, if necessary the files are renamed.

In addition to the usual pack formats ZIP and RAR unpacked 7zip. The Windows format CAB, the UNIX / Linux formats TAR, RPM and DEB, and rarer pack formats like GZIP, BZIP2, ARJ, LZH, APM, CHM, Z or CPIO.Standardly, the data compression program generates 7-Zip archives in 7z format The file extension of the same name .7z. Each of these 7z archives can contain several directories and files. The format 7z is basically a pure container format, which is open and modular.

7z: The alternative to Winzip and Winrar

The download of 7-Zip is free of charge and is therefore an excellent solution for all compression and decompression procedures of data encryption. Packing and unpacking is a children’s game that does not require any great instructions and is handled by itself.

7-Zip is the tried and tested program for packing and unpacking archives

7-Zip is often used to make file packets from images or multiple data into a handy package. The bundled packages have a much lower memory size and can be easily and simply used as attachments in emails.

The 7-Zip Portable Download supports the formats 7z, ZIP, GZIP, BZIP2 and TAR (Pack + Extract) as well as RAR, CAB, ISO, ARJ, LZH and CHM , Z, CPIO, RPM, DEB and NSIS (only unpacking). Although the program is free and open-source, the 7-Zip Portable Download often shows higher compression than RAR and ZIP.

The three probably most frequently used data compression programs on the market are probably Winzip, Winrar and 7-Zip. After years of development the three programs are finally also able to process file formats such as 7z, rar or zip.

The 7-Zip file formats include Apple Disk Image (.dmg), Apple Hierarchical File System, ISO images from CDs and DVDs (.iso), UDF images from DVDs (.udf), and Microsoft’s Virtual Hard Disk (. Vhd). Also multimedia files like Flash videos (.flv) or Shockwave Flash (.swf) can be packed with 7-Zip and compressed for a better data transfer.

Which of the three known data decompression programs the user wants to use ultimately, is entirely with him, since there are no too big differences in the versions and versions. Before a program for restoring the files is used, it is worth to exclude annoying sources of error, unfortunately Often overlooked.

For example, CRC errors are often due to badly entered passwords. Therefore, the password should be checked again. Often, the files can then open. You can also download a new version of the Extract program. Even if the file has been packed with a new version, but its own program is not up-to-date, errors can occur.

Repair and open broken Zip files

The problem can often be solved with the attempt to open the file on another PC. The user does not know what is the problem, but can still access the files. Since malicious anti-virus programs can also be responsible for the problems, it may be worth disabling them for opening the ZIP file.

However, this should only happen if the data source can be trusted. For the future, it is also recommended to create back-ups based on the generic principle from important files. For archives, it should also be checked whether all parts are actually present and the unpacking process does not stop because one is missing.
The ZIP format is next to RAR archives the most common format for packed files. If you download a ZIP file with an Android device or get it via e-mail, you can not open the packed file easily and thus do not access the content. However, there are ways to open your pack files in the format ZIP on Android devices.

Without additional installation, you can just connect your device to the computer and move the downloaded ZIP file from the Android device to the hard disk. There you use then a free packing program like WinRAR or WinZIP for extracting the Android-Received ZIP archive. In the Google Play Store, there are also numerous free Android apps for unpacking ZIP archives.

Download for example the Android version of WinZip or the popular AndroZip file manager on your Android device. After the installation, you start the app. Using the Dateimanager you will see existing Zip archives on the Android device. Searches for files with the extension .zip and type them. The corresponding unpacking apps such as WinZip or AndroZip do their work directly and put the content, ie pictures, documents etc. on your smartphone or tablet. Just as easy as extracting is also the creation of packed Zip archives with AndroZip And WinZip for Android.

Browse through the folder with the files you want to pack. In the top menu bar is now the appropriate option to create the zip file on Android. With the checkboxes you can select all pictures, office documents, text files, etc., which should be packed into your Zip-Archive. If you have selected all the desired files, click on “Zip” in the upper right corner. Now you can specify a filename for the archive. This is stored in the same folder where your source files have been found. The Zip archive is finished on Android