7Z File Extension

7Z file icon
7-Zip Compressed Format
  • Developer
    7-Zip
  • Popularity
    4.3 (14 votes)

What is 7Z file?

Files with the .7Z extension contain archived data, which can be compressed and encrypted. It enables to use pre-processing algorithms - BCJ, BCJ2 and Delta Encoding. An archive can be divided, and in such situation extensions of specific elements of a package are complex: name.7z.001, name.7z.002, etc.. This format provides high level of compression and it is open, therefore – various algorithms can be used for data compressing.

The most popular algorithms used for compression in 7Z format:


  • LZMA – base on LZ77 algorithm, but providing better parameters,
  • LZMA2 - upgraded LZMA,
  • PPMD – algorithm based on PPMdH, introducing some small changes,
  • BZip2 - classic BWT algorithm,
  • Deflate – classic, based on LZ77 algorithm.

7Z is native for the 7-Zip program, it uses the LZ77 compression algorithm as default. It supports AES-256 encryption, using derivative functions based on the SHA-256 algorithm in order to create a key based on the password provided by the user. Format was developed in 1999 by Igor Pavlov.

Conversion of a 7Z file

When you install one of the applications from the list of programs that you found here, you should be able to open or edit the file with the 7Z extension without any issue. However, if you still have problems with this, you may use the option of 7Z file conversion to a different format.

File Conversions from 7Z extension to a different format
File conversions from other format to 7Z file

We hope we helped you solve the problem with the 7Z file. If you do not know where you can download the application from our list, click on the link (which is the name of the program) - you will find more information there on the location where to download the secure setup version of the required application.

What else may cause problems?

There can be more reasons which determine that you are not able to open the 7Z file (apart from the lack of the proper application installed).

First - the 7Z file may be incorrectly associated with the application installed to support it. In this case, you need to change this association by yourself. To do this, right-click on the 7Z file that you want to edit, click "Open with" and then select the program from the list that you have installed. After this operation, the problems with opening the 7Z file should be solved.

Second - the file you want to open can simply be damaged. Then, the best solution is to find a new version of given file, or download it again from the same source as before (maybe for some reason in the previous session the download of the 7Z file has not been completed and it cannot be opened properly).

Do you want to help?

If you have additional information about the 7Z file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on 7Z file.

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