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forkphorus

forkphorus runs Scratch 3, 2, and 1 projects really fast by compiling them to JavaScript. Try it out by pasting a project ID or URL into the field below, selecting a project file, dropping a file on the page, or exploring the examples studio.

Try out TurboWarp

TurboWarp is similar to forkphorus but faster and has greatly improved compatibility. Give it a try, you might like it.

Report a problem

forkphorus is still in development. Click here to report a problem with this project. You can also comment problems here if you don't have a GitHub account.

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Settings

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Credits

forkphorus is maintained by GarboMuffin and other contributors. It is a fork of Nathan's phosphorus. Its CPS-style compilation was inspired by Rhys's sb2.js. The JSZip library is used to read .sb2 and .sb3 files. The canvg library is used to render SVGs for Scratch 2 projects. The scratch-sb1-converter library is used to support Scratch 1 projects. The cloud variable server is hosted by fosshost.org.

Code

The source code for forkphorus is available on GitHub.