The File Extensions Database

.7Z File Extension

  • Developer by: Igor Pavlov
  • Category: Compressed Files
  • Format: Binary

What is an .7Z file?

.7Z is 7-Zip Compressed File

A 7Z file is a compressed archive created with Igor Pavlov's 7-Zip file compression utility. It uses open-source LZMA compression, which has a high compression ratio and can include strong AES-256 (256-bit) encryption. The file supports Unicode file names, archive header compression, and file sizes up to 16,000,000,000 GB.

While 7z compression uses the LZMA method by default, the 7z format also supports the PPMD, BCJ, BCJ2, BZip2, and Deflate compression methods.

The 7-Zip file archiver is available as a free download from

Programs that open 7-Zip Compressed File
File Viewer Plus
Corel WinZip 23
Smith Micro StuffIt Deluxe for Windows
B1 Free Archiver
WinRAR 5
WinInizio ZipGenius
ConeXware PowerArchiver
Corel WinZip Mac 6.5
Smith Micro StuffIt Deluxe 16
Incredible Bee Archiver
B1 Free Archiver
Sixty Five 7zX
The Unarchiver
B1 Free Archiver
File Viewer for Android
ZDevs ZArchiver

How to solve problems with 7Z files

  • Associate the 7Z file extension with the correct application. On :
    Windows: Right click on any 7Z file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.7Z files". Mac: Right click (or Ctrl-click) the 7Z file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .7Z is 7-Zip Compressed File. Because only the current version supports the latest 7Z file format. Search, therefore, e.g. on the Igor Pavlov manufacturer website after an available .7Z is 7-Zip Compressed File update.
  • To make sure that your 7Z file is not corrupted or virus-infected, get the file again and scan it with antivirus software.