Animated CSS backgrounds tested for real-world UI readability.
Compose layered gradients, patterns, and film grain. Preview legibility across Hero headers, UI cards, and mobile screens with real-time contrast checking.
Aurora Borealis
Checking text legibility against layered CSS background at 60 frames per second.
No sign-up required · Zero JavaScript animation thread overhead · Plain CSS & Tailwind
From blank canvas to finished background
in under a minute.
Pick your layers
Toggle on the layers you need — base color, gradient, pattern, noise, or animation. Each layer is independent.
Adjust properties
Tweak gradient angles, pattern sizes, noise intensity, animation speed — all with sliders and live preview.
Copy the CSS
Hit 'Copy CSS' and paste into your project. You get clean background-image stacks, SVG noise, and @keyframes — ready to use.
Four layer types, one output.
Each layer stacks on top of the previous one. Enable what you need, disable what you don't. The studio composes them into a single CSS block.
Gradient Builder
Choose linear, radial, or conic gradients. Set custom angles, add up to 6 color stops, or pick from 25+ built-in presets.
Pattern Overlay
Layer dot grids, lines, diagonals, checkerboards, or crosses on top of any background. Control size, color, and opacity.
Noise Texture
Add SVG-based grain for film-like texture, frosted glass effects, or subtle depth. Dial intensity and opacity independently.
CSS Animation
Animate your gradient with GPU-powered CSS keyframes. Pick a preset, set speed (0.25x-3x), and choose direction.
The output is pure CSS.
No runtime. No JavaScript. No bloat.
Everything you create in the studio exports as standard CSS that works in any browser, any framework, any project. Zero dependencies in the final output.
Layered backgrounds, composed visually.
Instead of hand-writing stacked background-image rules, pattern SVGs, and animation keyframes — just toggle layers on, adjust sliders, and let the studio generate the CSS for you.
One-click CSS export
The generated CSS includes stacked background-image layers, background-size values, noise as an inline SVG data URI, and animation keyframes. Paste it and it works.
Included in output
MIT Licensed
Free for personal & commercial use