File Extension 7Z

  • Full name
    7-ZIP Compressed 7z Archive Format
  • Developer
  • Popularity
Have you encountered a problem with a 7Z file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a 7Z file here. In the further part of this page we have added a list of programs that should open your 7Z file. It is enough you choose a proper application for your operating system, download and install it.


Files ending in .7z are compressed archives created with Igor Pavlov's free 7-Zip open source packaging program. 7-Zip uses the open-source LZMA compression method, but can also use LZMA2, PPMd or BZip2. 7Z is next to .zip and rar the most common pack formats.

The LZMA compression method has a high compression rate and can also be provided with the strong AES-256 (256-bit) encryption, whereby the file names can be encrypted. The price for the high compression rate is a longer packing time.

The 7Z archive format can contain unicode file names (for example, Korean or Chinese characters) and has a maximum file size of 16,000,000,000 GB. Standard archives created with 7-Zip contain recovery data to repair the archive in case of corruption.

But you can also create so-called solid archives, which are sometimes considerably smaller (depending on the archived data), but contain no recovery data.

Programs which can open a 7Z file

How to open a 7Z file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the 7Z file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a 7Z file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support 7Z files. At this point we are looking for disk space where the application was installed in and we can link it with a 7Z file. Since then, our operating system will use the selected program to support all 7Z files.

Other issues

Despite the described problem with 7Z there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the 7Z file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the 7Z file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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