.7Z File Extension

.7Z File Extension

File Type

7-Zip Compressed File

Developer Igor Pavlov
4.1  |  470 Votes
Category Compressed Files
Format Binary

What is a 7Z file?

A 7Z file is a compressed archive created by various file compression utilities, most notably, Igor Pavlov's 7-Zip. It is compressed with open-source LZMA compression, which features a high compression ratio and may include AES-256 (256-bit) encryption. 7Z files may contain multiple directories or files compressed to save space for storage or transportation purposes.

More Information
Screenshot of a .7z file in 7-Zip 19
7Z file open in 7-Zip 19

The 7z format was initially released in 1999 and utilized by 7-Zip, a free, open-source application used to archive and compress data. It was eventually placed in the public domain in December 2008 and is still maintained.

7z compression uses the LZMA method by default. The 7z format also supports the PPMD, BCJ, BCJ2, BZip2, and Deflate compression methods. Additionally, the file type supports Unicode file names, multi-part archives, archive header compression, and file sizes up to 16,000,000,000 GB.

How do I open a 7Z file?

You can extract files contained in a 7Z archive with various decompression utilities, such as 7-Zip (Windows), Corel WinZip (Windows), Apple Archive Utility (bundled with Macs), Corel WinZip Mac (Mac), and B1 Free Archiver (multiplatform).

If your 7Z archive is split into a multi-volume archive (e.g., you possess a .7Z file, a .7Z.001 file, a .7Z.002 file, and so on), you can extract all the files included within the multi-volume archive by opening the archive's primary 7Z file in a decompression utility. Note that, for this to work, all the files contained within the multi-volume archive must be stored in the same folder. Also, you must possess every file included in the archive. For example, if you have a .7Z.003 file and a .7Z.005 file, but not a .7Z.004 file, you may have trouble extracting your files.

NOTE: Some 7Z archives may be password-protected. To open these archives, you must enter the password used to create the archive when prompted.

Open and view .7Z files with File Viewer Plus.Free Download

Programs that open or reference 7Z files

Updated November 23, 2021

Verified by FileInfo.com

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