Five Steps to Open SDT Files

If you have SDT files that you need to open, but you’re not sure how, follow these steps.


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Step 1: Double-click the file.

Locate the SDT file icon and double-click it. If you have the right program installed, it should open the file automatically. If it doesn’t, move on to Step 2.

Step 2: Look for another program.

If the SDT file doesn’t open when you double-click it, you probably don’t have the right program on your computer. There are several popular programs that can be used to open a SDT file. Try one of the three most common programs: QuickBooks Data, Theme Park World Archive, or Siemens Mobile Theme.

Step 3: Check the file type.

If none of the above programs will open your SDT file, check the file type to make sure you have a program that can open that type of file. Most SDT files are Page Layout Files, but there’s a chance it might be another type.

You can find this information in the file’s properties. On a Windows computer, just right-click the file and click properties, and look for the file type under “Type of File.” On a Mac computer, right-click the file and click “More info,” and look for the file type under “Kind.”

Step 4: Get help from a developer.

If you can’t figure out how to open a SDT file, a developer can probably tell you how. Find the program you have in the table below and contact the developer of that program.

Program Name Developer Name
QuickBooks Data Intuit Inc.
Theme Park World Archive Windows Programmer
Siemens Mobile Theme Siemens AG
Smart Diary Suite Scratch Pad Programming Sunrise
NEPLAN Protection Device File BCP Busarello + Cott + Partner Inc.
Grand Theft Auto III Audio Structure Data Rockstar Games
Dungeon Keeper 2 Archive Microsoft Developer
Sony JPEG Image Sony Corporation of America
SmartDraw Template SmartDraw.com

Step 5: Find a universal file viewer.

The easiest way to open a SDT file, or any kind of file, is to use a universal file viewer like File Magic (Download). You can use it to open many different file formats. If it’s not compatible, the file will just open in binary.

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