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Basic information about SIDX file

When there is a problem with opening files with the file extension SIDX（*.SIDX or *.sidx）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the SIDX file yourself.

There are 1 file types using the SIDX file extension in our database. In the further part of this page, you will find detail information about all the SIDX file with their brief description and a list of programs that support SIDX file sorted by operating systems. The table below provides useful information about the SIDX file extension. It answers questions such as:
  • What is the SIDX file?
  • How to open a SIDX file?
  • What programs do I need to open a SIDX file?
  • What programs help to create and edit a SIDX file?
  • How to convert SIDX files to another file format?
  • How to convert another files to SIDX file format?


1.Detail information about SIDX file extension: StuffIt Archive Index File

File type StuffIt Archive Index File Category Data Files
Developer Smith Micro File format Binary
Description SIDX file is a StuffIt Archive Index File developed by Smith Micro. Index file created by StuffIt Deluxe, a file compression and decompression utility; contains a list of reference information about files in a separate file archive; enables users to browse the contents of a particular archive without having to process or decompress it first.
Software programs that will open, edit or convert SIDX files

Windows		 Smith Micro StuffIt Deluxe for Windows

macOS		 Smith Micro StuffIt Deluxe 16



Can't open a SIDX file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.SIDX”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the SIDX extension without any issue.


Where I can download the application that support SIDX file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of SIDX files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a SIDX file?

The reasons for the lack of the ability to open a SIDX file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a SIDX file. If there is still something wrong, you might want to check:

  • Whether the SIDX file is damaged.
  • Whether the SIDX file is incorrectly linked in the registry entries.
  • Whether the SIDX file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the SIDX file format is incompletely.
  • Whether the SIDX file is infected.
  • Whether the drivers of the equipment used for opening a SIDX file are up to date.
  • Whether your computer has enough hardware resources to open a SIDX file.

If the SIDX file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.