License & Registration
Bandizip License Policy
How to register Bandizip
In-depth Comparison
How to receive a receipt
Exclusive features of Bandizip Paid Edition
How to use the Password Manager
How to use Repair Archive
How to use the Password Recovery
How to preview images in an archive with Bandizip
How to use Antimalware Scan on Archive
Features & Technical Terms
How to use Extract Here (Smart)
How to split a large file into smaller files with Bandizip
How to use Unicode filenames in ZIP format
ZIPX archive format
7z archive format
Solid Compression
How to open RAR files
How to open ALZ and EGG files
How to use Fast Drag and Drop
How to use Multi-core Compression
How to use High-speed Archiving
How to modify an archive without decompression
How to open a file in an archive without extraction
How to edit a file and save it in an archive directly
How to set a password for an archive
How to encrypt filenames in archives
How to move files to Recycle Bin (Trash) when deleting
Compress a file even when the file is used by another process
How to prevent data corruption by safe backup
How to test an archive
How to copy Zone.Identifier information for malware protection
How to export and import Bandizip settings
How to uninstall Bandizip
Update types
Command Line Parameters
Bandizip Setup Command Line Parameters
Introduction to Windows 10 on ARM
Troubleshooting
How to troubleshoot when I can’t install or register Bandizip
How to troubleshoot when I can’t access the email account that I used to buy Bandizip
How to troubleshoot when codepage auto-detection doesn’t work correctly
How to troubleshoot when Bandizip opens archive files automatically when I download them on the browser
How to troubleshoot when an icon for archives doesn’t appear properly in the File Explorer
How to troubleshoot when a right-click menu (context menu) for Bandizip doesn’t appear
How to troubleshoot when Error 22 occurs and Mac Finder on Catalina can’t extract ZIP archive
How to troubleshoot when Mac Finder can’t extract an encrypted ZIP file
How to use a non-alphabetic language character in a password
How to test multiple archives
How to attach an executable file (.exe) in Gmail
How to troubleshoot “The parameter is incorrect.”
How to troubleshoot when I can’t open an archive in a network mapped drive
How to troubleshoot when a split archive can’t be decompressed
How to troubleshoot when bdzsfx.x86.sfx is diagnosed as malware
How to run Bandizip on Linux using Wine

〈 วิธีใช้

7z archive format

7z format was developed and introduced by Igor Pavlov in 1999.

Used in 7z format, LZMA and LZMA2 are powerful compression algorithms and published as open-source (public domain), so they are used widely in the IT industry.

Advantages of 7z

7z is a relatively new archive format compared to the other old ones. So this format has these advanced features.

  • 7z uses LZMA/LZMA2 compression algorithms of high compression ratio. Especially, LZMA2 is an improved algorithm of LZMA with multi-threading. The more CPU cores, the faster the compression speed is.
  • Supports advanced encryption method (AES256).
  • Supports filename encryption. Without a password, you can’t even access the name of the file in the archive.
  • Supports solid compression, which improves compression ratio when processing multiple similar files.
  • Unicode filenames, Processing large file over 4GBytes, etc.

Disadvantages of 7z

To achieve even higher compression ratio, 7z uses various ways including header compression.

Because of those features, however, it is almost impossible to recover a compressed file when it is damaged even slightly.

Therefore, please be careful not to damage your important files when you backup them in 7z format.

You may find information on how to recover damaged 7z files in 7z website, but making a complete recovery is extremely difficult even for experts.

Learn more: https://www.7-zip.org/recover.html

Features of 7z created by Bandizip

Bandizip creates 7z archive files with its own compression module based on LZMA SDK.

Therefore, when you compress files with Bandizip, the features of the archive files differ from those of the files made on 7-zip as follows:

  • Bandizip’s file encryption always encrypts an archive header.
  • Bandizip supports LZMA and LZMA2 only; other compression algorithms used in 7z format are not supported.