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.sidx File Extension

Developer: Smith Micro

File type: StuffIt Archive Index File

You're here because you have a file that has a file extension ending in .sidx. Files with the file extension .sidx can only be launched by certain applications. It's possible that .sidx files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .sidx file?

The SIDX file extension, developed by Smith Micro, is StuffIt Archive Index Files created by the software StuffIt Deluxe. This is a utility used for compression and decompression of files and is made up of a list of reference information about particular files and these are located in a separate file archive. The application enables its user to go through the contents of a specific archive without the hassle of processing or decompressing it first. It is important to know that SIDX files are incapable of storing the files they reference. It only stores the file content information in a separate archive. Smith Micro StuffIt Deluxe version 2011 for Mac operating system and Smith Micro StuffIt version 2010 for Windows operation system is the main program that can open SIDX file extensions.

how to open a .sidx file?

Launch a .sidx file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .sidx file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .sidx files aren't yet associated with it. In this case, when you try to open a .sidx file, you can tell Windows which application is the correct one for that file. From then on, opening a .sidx file will open the correct application. Click here to fix .sidx file association errors

applications that open a .sidx file

StuffIt Deluxe 2009

StuffIt Deluxe is a file compression software used in compressing, securing, and sending files and enables sharing of large files, photos, and email online with file security and protection. Photos, music, and other documents can be shrunk without compromising its quality. It features SendStuffNow, a file transfer and storage service that can store up to 2 GB worth of files that can be shared through email invitations for downloading files. It also features SmartSend that can send large files through e-mail. The small files are automatically compressed then attached into a new email message, and larger files are uploaded into a secure website though the SendStuffNow.com, which permits access for downloading files from any location. The software supports plug-ins that allows direct access of StuffIt from any application such as Adobe Photoshop and Microsoft Office. StuffIt has an exclusive patent-pending technology that can compress any JPEG image without losing quality.The compressors of the software functions specifically for file targets like MP3s, PDFs, Microsoft Office documents, e-mails and presentations.

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a word of warning

Be careful not to rename the extension on .sidx files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .sidx. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.