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.SIT File Extension

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File TypeStuffIt Archive

DeveloperSmith Micro
3.9 (16 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryCompressed Files


File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.


Compressed file "stuffed" by Smith Micro StuffIt software; common file compression format used on Macintosh systems; originally Mac-only, now cross-platform, meaning SIT files can be created and opened on both Macintosh and Windows platforms.

More Information

Stuffit was previously developed by Allume Systems (formerly Aladdin Systems), but is now developed and distributed by Smith Micro.

Programs that open SIT files
Smith Micro StuffIt Deluxe for Windows
Smith Micro StuffIt Deluxe 16
Incredible Bee Archiver
The Unarchiver
Updated 10/6/2014

FileInfo - The File Extensions Database

This page contains information about the .SIT extension and its known file associations. Our goal is to help you understand what an SIT file is and how to open it.

The StuffIt Archive file type, file format description, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and therefore do not publish any information we have not verified.

If you would like to suggest any additions or updates to this page, please let us know!