- The 256-bit AES cipher. Encryption can be enabled for both files and the 7z hierarchy. When the hierarchy is encrypted, users are required to supply a password to see the filenames contained within the archive. WinZip-developed Zip file AES encryption standard is also available in 7-Zip to encrypt ZIP archives with AES 256-bit, but it does not offer filename encryption as in 7z archives.
- Volumes of dynamically variable sizes, allowing use for backups on removable media such as writable CDs and DVDs
- Usability as a basic orthodox file manager when used in dual panel mode
- Multiple-core CPU threading
- Opening EXE files as archives, allowing the decompression of data from inside many "Setup" or "Installer" or "Extract" type programs without having to launch them
- Unpacking archives with corrupted filenames, renaming the files as required
- Create self-extracting single-volume archives
- Command-line interface
- Graphical user interface. The Windows version comes with its own GUI; however, p7zip uses the GUI of the Unix/Linux Archive Manager.