Home : File Types : SITX File

.SITX File Extension

File TypeStuffIt X Archive

DeveloperSmith Micro
3.6 (15 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryCompressed Files


This file is saved in a binary format, which requires a specific program to read its contents.

What is a SITX file?

A SITX file is a compressed file saved in the Stuffit X archive format, the default format used by StuffIt 7.0 and later. It features Smith Micro's exclusive ATOM compression technology and offers up to 20% more compression than standard Stuffit (.SIT) archives.

More Information

The SITX format supports long filenames, preservation of UNIX (i.e. OS X) and Windows file permissions, and error correction, which fixes data transmission errors. It also supports password protection using 512-bit RC4 encryption or other encryption methods, including AES, DES, and Blowfish. Version 9 and later provides 15-30% compression of JPEG images.

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

Open over 300 file formats with File Viewer Plus.
Programs that open SITX files
Smith Micro StuffIt Deluxe for Windows
Smith Micro StuffIt Deluxe 16
Incredible Bee Archiver
The Unarchiver
Updated 8/15/2016

.SITX Extension Information

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

The StuffIt X 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 We strive for 100% accuracy and do not publish any information we have not verified.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.