.SIT File Recovery

Have files been deleted due to a user’s error or software error? Have you formatted a disk by accident and need to know how to recover the files? Read our .SIT file recovery guide for Windows, MacOS, Android and IOS in 2023.

SIT File Recovery

What is a .SIT file?

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.

What Are Common Causes of ".SIT" Files Lost or Failure?

There can be several common causes for ".SIT" files to be lost or fail:

  1. Accidental deletion: Users may accidentally delete ".SIT" files while organizing or cleaning up their computer. This can happen when deleting unnecessary files or folders without realizing that the ".SIT" file is still needed.
  2. File corruption: ".SIT" files can become corrupted due to various reasons such as hardware or software issues, power outages, or improper file transfers. When a ".SIT" file is corrupted, it may fail to open or become inaccessible.
  3. Virus or malware infection: If a computer is infected with a virus or malware, it can potentially damage or delete ".SIT" files. Some viruses specifically target certain file types, including compressed files like ".SIT", to cause data loss or corruption.
  4. Software or system errors: Errors within the software or operating system can lead to ".SIT" file loss or failure. This can occur due to software bugs, conflicts, or crashes that result in the deletion or corruption of ".SIT" files.
  5. Hardware failure: If the storage device where the ".SIT" files are stored, such as a hard drive or USB drive, experiences a hardware failure, it can lead to data loss or corruption. This can happen due to physical damage, manufacturing defects, or wear and tear over time.
  6. Improper file compression or extraction: When compressing or extracting ".SIT" files, errors can occur if the process is interrupted, the software used is incompatible or outdated, or if incorrect settings are applied. These errors can result in the loss or failure of ".SIT" files.
  7. Human error: Users may accidentally rename, move, or overwrite ".SIT" files, leading to their loss or failure. Additionally, improper handling of files, such as force quitting an application during a file operation, can also cause ".SIT" file issues.

It's important to regularly back up important ".SIT" files to prevent loss or failure. Additionally, using reliable antivirus software, keeping software and systems up to date, and practicing safe file handling can help minimize the risk of ".SIT" file issues.

How to recover lost ".SIT" files?

Sometimes while working with a computer, laptop or other stationary or mobile devices, you may encounter various bugs, freezes, hardware or software failures, even in spite of regular updates and junk cleaning. As a result, an important ".SIT" file may be deleted.

Go to view
🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

By no means should you think that the only way to recover a ".SIT" file is always to create it once more.

Use programs for recovering ".SIT" files if a file was lost after accidental or deliberate deleting, formatting the memory card or the internal storage, cleaning the storage device, after a virus attack or a system failure.

Programs to recover ".SIT" files

Looking for a way to get files back? In cases when files were deleted and they cannot be restored by using standard operating system tools, use Hetman Partition Recovery.

The tool recovers data from any devices, regardless of the cause of data loss.

Follow the directions below:

  1. Download Hetman Partition Recovery, install and start the program.

  2. The program will automatically scan the computer and display all hard disks and removable drives connected to it, as well as physical and local disks.

    File Recovery Software
  3. Double-click on the disk from which you need to recover ".SIT" files, and select analysis type.

    Hetman Partition Recovery - Analysis Type
  4. When the scanning is over, you will be shown the files for recovery.

    Hetman Partition Recovery - Files that Can be Restored
  5. To find a file you need, use the program’s interface to open the folder it was deleted from, or go to the folder "Content-Aware Analysis" and select the required file type.

    Hetman Partition Recovery - Deep Scan
  6. Select the files you have been looking for and click "Recovery".

    File Recovery Software - Files List for Recovery
  7. Choose one of the methods for saving the files and recover them.

    Saving recovered files in Hetman Partition Recovery

How to open file with ".SIT" extension?

Looking for how to open a stereo stuffIt Archive image file file?

Programs that open ".SIT" files

Smith Micro StuffIt Deluxe for Windows Smith Micro StuffIt Deluxe for Windows
ExtractNow ExtractNow
Smith Micro StuffIt Deluxe 16 Smith Micro StuffIt Deluxe 16
Incredible Bee Archiver Incredible Bee Archiver
The Unarchiver The Unarchiver

Additional Information

  • File type: StuffIt Archive

  • File extension: .SIT

  • Developer: Smith Micro

  • Category: Compressed Files

  • Format: N/A

  • Mime-type: application/octet-stream

  • HEX: 53 74 75 66 66 49 74 20 28 63 29 31 39 39 37 2D, 53 49 54 21 00

  • ASCII: StuffIt (c)1997-, SIT!


We will be happy to answer your questions!

Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 13:47 #
    Leave a comment if you have any questions about Recovering lost .SIT files after deleting, cleaning or formatting!
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Vladimir Artiukh

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Oleg Afonin

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as xaker.ru, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.


Questions and answers

  • What are some common reasons for encountering problems when opening .SIT files, and how can they be fixed?

    There can be several reasons for encountering problems when opening .SIT files (StuffIt Archive). Here are some common issues and possible solutions:

    1. Missing or incompatible software: If you don't have the appropriate software installed to open .SIT files, you may encounter errors. Ensure that you have a compatible file compression and extraction tool like StuffIt Expander installed on your system.
    2. Corrupted or incomplete file: If the .SIT file is corrupted or was not downloaded properly, it may cause problems during the opening process. Try redownloading the file from a reliable source and ensure it is complete.
    3. Outdated software version: If you have an outdated version of the software, it might not support the latest .SIT file format. Check for updates for your compression tool and install the latest version.
    4. File association issues: Sometimes, the file association for .SIT files might be incorrect, leading to errors. To fix this, right-click on the .SIT file, select "Open with," and choose the appropriate software to associate with .SIT files.
    5. File is password-protected: If the .SIT file is password-protected and you don't have the correct password, you won't be able to open it. Make sure you have the necessary password to access the file.
    6. Operating system compatibility: In rare cases, certain operating systems may have difficulty opening .SIT files. Ensure that you are using a compatible operating system or try opening the file on a different system.

    If none of these solutions work, it's possible that the .SIT file itself is corrupt or damaged beyond repair. In such cases, you may need to seek an alternative copy of the file or contact the file's creator for assistance.

  • Are there any specific software or tools that can help resolve issues with opening .SIT files?

    Yes, there are specific software and tools that can help resolve issues with opening .SIT files. One popular tool is StuffIt Expander. It is a free file compression and expansion utility that supports various file formats, including .SIT files. StuffIt Expander is available for both Windows and Mac operating systems. Additionally, there are other third-party file compression and extraction tools, such as The Unarchiver, which can also handle .SIT files.

  • Can you provide step-by-step instructions on how to troubleshoot and fix problems with opening .SIT files on different operating systems?

    Sure! Here are step-by-step instructions to troubleshoot and fix problems with opening .SIT files on different operating systems:


    1. Check if you have a compatible extractor: .SIT files are compressed using StuffIt, so you need a compatible extractor like StuffIt Expander. If you don't have it, download and install it from the official website (https://www.stuffit.com/win-expander.html).
    2. Right-click on the .SIT file you want to open and select "Open with" from the context menu.
    3. If StuffIt Expander is listed, select it. If not, click on "Choose another app" and browse to locate StuffIt Expander. Check the box that says "Always use this app to open .SIT files."
    4. Click "OK" to open the .SIT file with StuffIt Expander. The file will be extracted to a folder or a location of your choice.


    1. Check if you have StuffIt Expander installed on your Mac. If not, download and install it from the official website (https://www.stuffit.com/mac-expander.html).
    2. Locate the .SIT file you want to open and double-click on it. If StuffIt Expander is set as the default extractor, it will automatically open and extract the contents of the .SIT file.
    3. If StuffIt Expander is not set as the default extractor, right-click on the .SIT file, select "Open With," and choose StuffIt Expander from the list. You can also drag and drop the .SIT file onto the StuffIt Expander application icon.


    Install the "unstuff" package, which provides the necessary tools to extract .SIT files. Open a terminal and enter the following command:


    sudo apt-get install unstuff


    1. Once the installation is complete, navigate to the location of the .SIT file in the terminal using the "cd" command.
    2. Extract the .SIT file by running the following command:


    unstuff filename.sit


    Replace "filename.sit" with the actual name of your .SIT file.

    The contents of the .SIT file will be extracted to the current directory.

    These steps should help you troubleshoot and fix problems with opening .SIT files on different operating systems.

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