SB3 File Extension
Scratch 3.0 Project File
- File Type sb3
- Developer MIT
- Popularity
- Application Scratch
- Category Data Files
- Format Zip
What is a SB3 file?
The SB3 extension is related to Scratch 3.0 Project File and is classified in the Data Files category, which contains 6196 files.
MIT, the developer of the Scratch 3.0 Project File (SB3), has released file format and programs designed to handle them.
SB3 file support extends to various operating systems, including Windows. There are 2 programs available to open a SB3 file, including popular tools like Scratch and SB3 to SB2 Converter.
Programs that support SB3 files
Windows
Online Services
How to open a SB3 file?
If you are having trouble opening a SB3 file, it usually means the right software is not installed. Choose a program from the list that matches your operating system. Next, visit the official website of the developer, download the software, and install it on your device.
Thanks to their popularity, Scratch and SB3 to SB2 Converter are often the go-to programs for managing SB3 files. If you want the most recent release of Scratch, head over to the MIT Media Lab site and download the version designed to run on all platforms.
After completing the installation, SB3 files should be recognized by the system and linked to Scratch.
Set Scratch as your default SB3 viewer
Set default app to open files on Mac
- Right-click or Control + left-click on the desired SB3 file to open a menu of available actions;
- Choose "Open in Application" and click "Other";
- In the lower section of the window, you’ll find the "Enable" menu, with "Recommended Programs" pre-selected as the default option;
- Select "All Programs" in this menu, and then search for Scratch. Check the box next to "Always open in app" to make sure it’s the default option.
Change a default app in Windows
- To get started, right-click your SB3 file, then choose "Open With" and select "Choose Another Application" from the context menu;
- From the list of applications in the pop-up window, find and select Scratch as your desired application;
- Check the "Always use this app" checkbox, and then click "OK" to set your chosen app as the default for opening SB3 files.
Solving Common SB3 File Challenges
While SB3 files can sometimes present difficulties, most problems can be resolved quickly with minor software modifications. Check the tips below to help solve them.
What Causes Scratch to Crash Frequently?
Insufficient software updates are a likely cause of Scratch crashes. Be sure to install the latest updates for MIT Media Lab products.
A simple restart of your computer can often fix many common problems, which is why it is the recommended first step before making any adjustments to your software settings.
How can I restore a damaged SB3 file?
Start a data recovery program and open the damaged SB3 file. Then, choose the "Repair" option from the menu. Allow the recovery process to complete, which will automatically repair the damaged data files.
How can I determine if my SB3 file is damaged?
Characteristics of corrupted SB3 data files can include:
- Scratch or other programs stop responding or crash when trying to handle the file;
- Error notifications appear during file manipulation;
- When opening the file, errors occur or the inability to access its contents;
- Unexplained SB3 file size inflation;
- Editing the archive in Scratch is hampered by poor overall performance;
How to edit a SB3 file?
To modify SB3 files, you need to install special software that makes it possible to open and edit data files. Online SB3 editors are more restricted compared to software designed for Scratch 3.0 Project File.
Best SB3 Editor Software in 2026
Taking the above factors into account, we have selected a list of SB3 editors currently available.
| SB3 Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Scratch | MIT Media Lab | Online Services | 4.2 out of 5 (38 reviews) |
Convert files to and from SB3
If working with a SB3 file is challenging, one solution is to convert it to formats like SB2 or other supported formats.
After converting a SB3 file, some capabilities may be limited, but you can often convert it back to the original format.