OptiDrop

CSS Border Generator — Radius, Shadow & Outline

Generate CSS for border radius (per corner), box shadow, and outline using intuitive sliders. Live preview and one-click copy. 100% free and private.

Border Radius
12px
12px
12px
12px
Box Shadow
0px
4px
12px
0px
25%
Outline
0px
0px

Free CSS Border Generator — Border Radius, Box Shadow & Outline

OptiDrop's CSS Border Generator lets you visually design border-radius, box-shadow, and outline properties using intuitive sliders. Each corner of the border-radius can be adjusted independently, and the box shadow supports X/Y offset, blur, spread, color, opacity, and inset mode.

Per-Corner Border Radius

Unlike basic generators, this tool lets you set different radius values for each corner (top-left, top-right, bottom-right, bottom-left). Create organic shapes, asymmetric cards, and unique design elements.

Advanced Box Shadow

Control every aspect of the box shadow: X and Y offset, blur radius, spread radius, color with opacity, and inset/outset mode. The generated CSS is ready to paste into your stylesheet.

Outline Support

Add an outline with customizable width, style (solid, dashed, dotted, double), color, and offset. Outlines are great for focus states and accessibility.

Frequently Asked Questions

Use the sliders to adjust border radius for each corner (top-left, top-right, bottom-right, bottom-left), box shadow (X offset, Y offset, blur, spread, color), and outline (width, style, color). The live preview updates instantly. Click "Copy CSS" to copy the generated code.
Yes, each corner has its own slider: top-left, top-right, bottom-right, and bottom-left. You can create asymmetric shapes by setting different values for each corner. The generated CSS uses the shorthand border-radius property.
A border is inside the element's box model and affects layout. An outline is drawn outside the border and does not take up space in the layout. Outlines are commonly used for focus states and accessibility highlights. This tool lets you configure both independently.
Yes, OptiDrop's CSS Border Generator is completely free. No account or sign-up is required. All processing happens in your browser. The generated CSS code is yours to use in any project.

Last updated: June 2026