Dwitter
Write animated JavaScript demos in 140 characters or fewer
On Dwitter you write a function u(t) in 140 characters or fewer of JavaScript. It runs sixty times a second and draws on a 1920 by 1080 canvas. Shorthands such as S for Math.sin and R for colour strings help you fit more in. Every post, called a dweet, is live and can be remixed.
Free · No login · Browser · Intermediate
About Dwitter
It trains size-coding tricks and creative maths: trigonometry, loops and pixel tricks squeezed into a tweet's length. It suits intermediate JavaScript programmers who enjoy visual results.
It runs in the browser. You can browse and run dweets without an account. Posting, voting and commenting need a free account, and there are themed challenges and hot, new and top feeds.
On Breakpoint since 25 Oct 2026.
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Tips and discussion
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