Canvas Snippets — Free HTML CSS JS Canvas Particle & Drawing Effects

Because the canvas has a CSS size and a separate backing-store size. Set canvas.width/height to the CSS size multiplied by window.devicePixelRatio, then scale the context by the same factor. Every canvas snippet here does this, which is why lines stay sharp on a phone.

SVG for a modest number of shapes you need to style, hit-test or animate individually — it stays in the DOM, so CSS and accessibility tooling can reach it. Canvas once you cross a few hundred moving elements, or when you need per-pixel work. Canvas draws pixels and forgets them, which is exactly why it scales.

Store the id from requestAnimationFrame and call cancelAnimationFrame when the element goes away. In a single-page app this matters: without it, the loop keeps running against a canvas nobody can see, burning battery for nothing.

No. Every snippet is plain HTML, CSS and vanilla JavaScript that runs in any page — a static file, a WordPress theme, a Rails view, anything. When you do want a framework version, the editor exports each snippet as a React component, a React + Tailwind component, a standalone Tailwind HTML file, a Vue 3 single-file component or an Angular standalone component.

Yes — copy, modify and ship them in personal or commercial work, with no attribution required and no licence to track.

Yes. Every snippet opens in a live editor with separate HTML, CSS and JS panels and a preview that updates as you type. Check it at mobile, tablet and desktop widths, then copy the code or export it in your framework of choice.