Free online SB2 to MP4 converter

Scratch projects need to become MP4 when they must play in a standard video player, be shared as a video, or be imported into a video editor. An SB2 file is a project, not a recorded video, so conversion renders its stage and scripts as linear playback.

What the SB2 format is

SB2 is the project format used by Scratch 2. It stores the project’s scripts, sprites, sounds, costumes, and stage, and is created or opened with the Scratch 2 editor. The file describes interactive behavior; it does not contain a finished video timeline.

What the MP4 format is

MP4 is a video container commonly used for playback, sharing, and editing across computers, phones, and video platforms. It can hold encoded video and audio, while an SB2 project’s scripts and interactivity are rendered into a fixed sequence of frames during conversion.

How to convert SB2 to MP4

Online on 101convert.com

1. Open the SB2-to-MP4 converter on 101convert.com and upload the project file. Multiple files can be added for batch conversion; the page shows the per-file size limit.
2. Set the video length before converting.
3. Start the conversion, then download the resulting MP4 file.

Offline with desktop software

Use the Scratch 2 Offline Editor to run the project and OBS Studio to record it. Scratch 2 Offline Editor is available for Windows and macOS; OBS Studio runs on Windows, macOS, and Linux.

1. Open the SB2 file in the Scratch 2 Offline Editor and start the project. Arrange the stage at the size you want in the recording.
2. In OBS Studio, add a display or window capture source and select the Scratch editor window. Include desktop audio if the project’s sounds should be recorded.
3. Start recording in OBS, run the project for the required duration, then stop the recording. Set OBS’s recording format to MP4 in Settings → Output → Recording.

Quality and limitations

The MP4 records the project as it runs, so timing, animation, and sound depend on playback and capture. An SB2 project can be interactive or loop indefinitely, but MP4 is linear and cannot retain its scripts or controls; set a suitable duration and make sure the desired scene plays during recording.