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StuffIt Expander
Developer(s) Aladdin Systems, Smith Micro Software
Stable release
Operating system macOS, Windows
Type File Compressor
License Proprietary
Website Homepage

StuffIt is a customizable file management platform for the archiving, compressing and encrypting of files. Distributed by Smith Micro Software, Stuffit uses advanced compression algorithms to shrink photos, music and other documents without any reduction in quality. The software allows users to securely upload, access and share files from anywhere, including Dropbox, Google Drive and Microsoft One Drive. StuffIt offers support for FTP, email and cloud storage integration. Users have the ability to streamline their workflow through customizable compression and plug-in options. StuffIt also automatically backs up files to disc or online, and protects sensitive information with strong, 256-bit AES encryption. StuffIt is available for both Macintosh and Windows operating systems. The most current version for Mac is StuffIt Deluxe 16, which was released in August 2014. The most current version for Windows is StuffIt Deluxe 2010, which was released in November 2009.


Filename extension .sit
Internet media type application/x-stuffit
Type code SITD, SIT2, SIT5 (depending on file version)
Uniform Type Identifier (UTI) com.stuffit.archive.sit
UTI conformation
Developed by Raymond Lau (creator), currently Smith Micro
Initial release 1987; 31 years ago (1987)
Container for files, including resource forks
Stuffit X
Filename extension .sitx
Internet media type application/x-stuffitx
Type code SITX
Uniform Type Identifier (UTI) com.stuffit.archive.sitx
UTI conformation
Initial release 2002; 16 years ago (2002)
Type of format archive file format
Container for files, including resource forks

Key Features
• Customizable StuffIt Destinations: The ability to save unique configurations for different types of compression formats.
• Access to Dropbox, Google Drive and Microsoft OneDrive.
• StuffIt Archive Manager allows for quick, in-application searches.
• StuffIt Deluxe Mac 16 is now 64-bit only and the minimum operating system is Mac OS X 10.8
• Updated artwork and icons is Apple mac OS X 10.10 (Yosemite) ready.
• Compresses MP3, WAV audio files an average of 10%-much better than ZIP.
• Optimized PDF compression.
• Optimized compression of 24-bit image files (Photoshop, TIFF, PNG, BMP)
• Compress JPEG photos up to 30%.
• Support for multiple FTP servers. Stores profiles of different servers for quick access.
• Disc burning now supports Blu-ray/HD-DVD media.
• Re-compress ZIP archives into StuffIt X archives for additional space savings.
• Create self-extracting archives.
• Create password protected archives.
• Create Stuffit, ZIP and TAR archives.
• Browse archives; examine the contents without expanding.
• Add, delete, and change files in archives.
• Search and archive by name, date and more.
• Burn archives to multiple CDs and DVDs.
• Expands more than 30 compression formats.

See also[edit]


Prior to version 5.0, the Windows version of Stuffit was known as Zip Magic. The Zip Magic name made a brief return in version 9.0, which was available as either Stuffit or Zip Magic, though the product was exactly the same either way. Stuffit has no connection with the current product known as ZipMagic, with no space.

External links[edit]