Porting Scratch Projects

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The Scratch project format (.sb or .sb2) can only be read by the Scratch editor. Compiling a scratch project can convert it to another format that can be opened without scratch. Compiling was a popular suggestion for Scratch 2.0,[1] However, it wasn't added in the normal online or offline editors. To get around this, several Scratchers have made ways to turn them into more widely known formats such as exe and app.

Porting is useful for those who want to distribute the project to various computers offline, especially if it's a game or not appropriate for Scratch.

This tutorial will cover how to turn a Scratch project into various executable file formats for Windows, Macintosh and Linux.

Scratch online to EXE

Online Converter

  1. Open the online converter here.
  2. On the converter page, enter your project ID in the box. This is the long number in all scratch project URL's. For example, if your project URL is https://scratch.mit.edu/projects/128316889/, then the ID would be 128316889.
  3. Click on next step and enter details about the project, then click next and change the options as you please.
  4. When you click "Build and Download", your application will be built and the ZIP file shall start downloading.
  5. Finally, extract the files from the downloaded ZIP archive and open your app. A small disclaimer box should appear, read this carefully and when you're done, click the Accept button. You can now share the app without this screen showing.


  • The executable file must be in the same folder as CORE.dll. In order to include all files in one downloadable file, use a ZIP archive.

SB2 (Scratch 2.0) to SB (Scratch 1.4)

It is possible for one to convert an SB2 file from Scratch 2 to a Scratch 1.4 SB file using blob8108's Retro Converter. Then, if desired, other tools can be used to port it to various formats.

Warning Note: The converter can only convert 1.4 blocks. It cannot convert 2.0 This means converted projects cannot use clones, cloud, custom blocks, or other new Scratch 2.0 features.

SB2 to SB

  1. Download your 2.0 project from the Scratch Website or the 2.0 Offline Editor.
  2. Go to the Retro Converter and follow the instructions there to convert to SB.
  3. Once converted, a pop-up should appear and you will be able to download a 1.4 version (SB) of your 2.0 (SB2) Scratch project.

SB to Other Formats

  1. Now, follow the other Scratch 1.4 tutorials on this page to convert to various other formats.


Warning Note: This converts to an EXE on Windows, and an APP on Mac OS X.
Warning Note: This only works for Scratch 1.4 and earlier.
  1. Install BYOB (see resources and links for a link to the website).
  2. Open your SB file.
  3. Click "Compile this project" under the Share menu.


SB to JAR (Java executable)

Warning Note: This only works for Scratch 1.4 and earlier.

This method works on all operating systems with a Java runtime installed, including Mac, Windows, and Linux.

  1. Download ToJAR (see resources and links)[2]
  2. Unpack/extract the .zip file
  3. In the ToJAR folder, double click on the program folder, then on the dist folder and then double click on the ToJAR.jar file.
  4. This will launch the ToJAR application which looks like this:
  5. Click the first select button and choose the input (SB) file.
  6. Choose your output name, and be sure to append the .jar file extension, for example Example.jar
  7. Choose your output location, being sure to put the name of your JAR file at the end. For example, C:/Documents and Settings/Documents/Example.jar
  8. Click "Compile"

SB to APP via Java

Warning Note: This only works on Mac OS X.
  1. Follow the steps above to make a JAR file.
  2. Find and launch the Jarbundler application, which should look like this:


  1. From the tabs at the top, the first tab says build information. You can set a custom icon in this tab if you wish. The icon must be in .icns format (use Icon Composer (comes with Mac) to convert a PNG file into .icns format). If no icon is provided, the icon shown will be used).
  2. Select the JAR file you created in toJAR as the Main Class.
  3. Click the button at the bottom that says Create Application...
  4. Choose an output folder to save your project in

SB2 to SWF

You can download a SB2 to SWF converter or use an online converter at this site.

Resources and Links


  1. https://web.archive.org/web/20120101192818/http://suggest.scratch.mit.edu/forums/60449-suggestions/suggestions/1240331-built-in-scratch2exe
  2. Forum topic
  • This page was last modified on 9 January 2018, at 23:36.