Five Steps to Open BUL Files

If you have BUL 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 BUL 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 BUL 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 BUL file. Try one of the three most common programs: Capella Report Card Data File, JSim I4 Bullseye Data Format, or Holiday Lights Screen Saver Bulb File.

Step 3: Check the file type.

If none of the above programs will open your BUL file, check the file type to make sure you have a program that can open that type of file. Most BUL files are Uncommon 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 BUL 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
Capella Report Card Data File Castor & Pollux Software Inc.
JSim I4 Bullseye Data Format University of Washington
Holiday Lights Screen Saver Bulb File Windows Programmer

Step 5: Find a universal file viewer.

The easiest way to open a BUL 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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