CSS Tools — Free Online Tools

GainUtility's CSS toolkit helps designers and developers create beautiful visual effects. Generate gradients, construct multi-layer shadows, design border radius patterns, and verify color accessibility — all with live preview.

Box-shadow guides

• box-shadow syntax & values — What each value does, with copy-ready examples and a live generator.
• Box-shadow examples gallery — Cards, buttons, inputs, rings, and glows — preview and copy each one.
• Multiple box-shadows — How comma-separated layers stack, paint, and combine into real depth.

Box-shadow articles

• Values real websites ship — 33,438 measured declarations from the CSS of the top 1,000 sites.
• box-shadow vs drop-shadow — Border-box rectangle versus alpha-shape shadow, with side-by-side demos.
• Soft shadow recipes — Copy-ready values that stay clean, and why stacked shadows go muddy.
• Neumorphism box-shadow guide — The two-layer light/dark formula, the inset flip, and where it works.

What You Can Do

• Gradient Design — Create linear and radial gradients with multiple color stops, randomize palettes, and export as CSS or PNG.
• Shadow Construction — Build multi-layer box shadows with custom offsets, blur, spread, and color controls.
• Accessibility Checking — Verify color combinations meet WCAG AA and AAA contrast standards.

How to Use

1. Choose the CSS tool you need from the collection.
2. Adjust parameters using the interactive controls.
3. Preview changes in real-time.
4. Copy the generated CSS code or export assets.

Frequently Asked Questions

Related Tools

• Gradient Generator — Design multi-stop CSS gradients.
• CSS Box Shadow Generator — Design layered, inset, or soft CSS shadows.
• Border Radius Generator — Design asymmetric corners and blobs.
• Contrast Checker — Verify WCAG color contrast compliance.