Build Your Own Blocks

 Run Snap! now 

What do you get if you combine

•drag-and-drop interface
•visual metaphors for loops,  
  conditionals, etc.
•easy animation tools
from Scratch
  +  
•first class procedures
•first class lists
•first class objects
•first class continuations 
from Scheme
  ?

You get a broadly inviting programming language for kids and adults that's also a platform for serious study of computer science. (See the About page for details.)

Examples:


Animated tree

Path Finder

Space Invaders

Snake

Menuet

Interactive tree

Swimmer

Count change

Y combinator

Animal game

Joke

Roman numerals

Teachers, check out the Beauty and Joy of Computing, an AP CS Principles course using Snap!.

Snap! 4.0.8.7 is the current version. Try out the language at http://snap.berkeley.edu/run (the button above).

Need help?Read the Reference Manual.
Manual updates:First class sprites
Tables
Linked lists
Still have a question?    Ask on our Scratch forum thread.
Found a bug?Report it at our Github repository.
Looking for BYOB3?    Download it here.

Turn your project into a standalone executable!

First "Export project" and save the resulting XML file. Then go to http://snapp.citilab.eu/

Import Scratch 2.0 projects

Go to Snapin8r2

Use devices with Snap!:

More Snap! extensions for CS education

Mirror Sites

If snap.berkeley.edu is ever unavailable, you can run Snap! at any of these mirror sites: We recommend bookmarking these now, while this site is up!

Browser Requirements

BrowserMinimum
Version
Required
Additional Notes
Chrome43Chrome is currently the recommended browser for Snap!
Safari8.4 
Firefox38 
Edge12 
Opera32 
IE11Internet Explorer does not comply with web standards. Some features (such as audio) may not work with any version.

For mobile browsers:

DeviceVersion Notes
iPhoneiOS 8 or higher. However on iOS, uploaded sound files can't be played in a script. (All iOS versions have this restriction.)
Android    Use Chrome for Android and not the stock browser that comes with some devices.

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See our complete privacy policy here.

Site layout by liam4.