CSS Generator Studio
5 CSS generators in one tool: border-radius, box-shadow, gradients, cubic-bezier easing curves, and a WCAG contrast checker — all with live previews and one-click copy.
- Pick a mode from the pill bar: Border Radius, Box Shadow, Gradient, Cubic Bezier, or Contrast Checker.
- Adjust the inputs — drag sliders, pick colors, or type exact values — and watch the live preview update instantly.
- For Box Shadow and Gradient, use the Add/Remove buttons to stack multiple shadow layers or color stops.
- Copy the generated CSS (or contrast ratio) with one click and paste it straight into your stylesheet.
All processing happens entirely in your browser. Your data never leaves your device.
Key Features
- Border Radius generator with 4 independent corner inputs, px/% units, and a link-all-corners toggle
- Box Shadow generator supporting multiple stacked shadow layers with color, alpha, and inset controls
- Linear and radial Gradient generator with unlimited color stops and adjustable angle
- Cubic Bezier curve editor with a live SVG plot and 6 popular easing presets
- WCAG 2.0 Contrast Checker with hand-implemented relative luminance and contrast ratio math
- Pass/fail badges for AA Normal, AA Large, AAA Normal, and AAA Large text thresholds
- Live preview for every mode, updated instantly as you adjust inputs
- One-click copy for every generated CSS value — nothing ever leaves your browser
About CSS Generator Studio
CSS Generator Studio bundles five of the most commonly needed CSS authoring tools into a single workspace, so you don't have to bounce between five different websites while building a UI. Each mode generates production-ready CSS from a visual, form-based interface — no need to memorize syntax for border-radius shorthand, layered box-shadow values, gradient stop notation, or cubic-bezier() timing functions.
The Border Radius, Box Shadow, and Gradient modes all pair their controls with a live preview box so you can see exactly what the resulting style looks like before copying it. The Cubic Bezier mode renders an interactive SVG plot of your easing curve alongside quick-select presets for common animation curves like ease-in-out and easeInOutBack. The Contrast Checker mode implements the WCAG 2.0 relative luminance and contrast ratio formulas from scratch, so you can verify text/background color pairs meet AA or AAA accessibility thresholds before shipping.
Everything runs client-side with plain JavaScript math — no external CSS-in-JS libraries, no network calls. It's built for front-end developers and designers who want fast, accurate CSS snippets without leaving their workflow.
Frequently Asked Questions
No. Every calculation — including the WCAG luminance and contrast math — runs entirely in your browser using plain JavaScript. Nothing is uploaded anywhere.
There's no hard limit — use the Add button in Box Shadow or Gradient mode to stack as many layers or stops as your design needs, and Remove to trim them back down.
They reflect WCAG 2.0 success criteria: AA requires a 4.5:1 ratio for normal text (3:1 for large text), while the stricter AAA level requires 7:1 for normal text (4.5:1 for large text). A green Pass badge means your color pair meets that threshold.
Yes for the x-coordinates in particular — the CSS spec allows y-values outside 0-1 to create overshoot/bounce effects (like the easeInOutBack preset), so the sliders allow a -1 to 2 range to support those curves.
Border-radius, box-shadow, gradients, and cubic-bezier() are all standard, widely-supported CSS features with no vendor prefixes required in any modern browser.