Preview
Ready to generate
Adjust values and click Generate CSS// design rounded corners and copy CSS instantly
Create custom CSS border-radius values visually, preview every corner live, and copy clean CSS for buttons, cards, images, and UI blocks.
Ready to generate
Adjust values and click Generate CSSChoose pixels, rems, or percentages depending on the layout you are designing.
Use the inputs or sliders to build symmetric, asymmetric, pill, or blob-like shapes.
Generate shorthand and expanded border-radius declarations for your stylesheet.
This tool helps frontend developers and designers create CSS border-radius values visually. It is useful when exact corner values matter and guessing in DevTools becomes slow.
It rounds the outer corners of an element border box. You can apply one value to all corners or different values to each corner.
Yes. Use the Pill preset or set a very large radius such as 999px for all corners.
Percentage values are based on the element dimensions, so they are useful for circles, ovals, and responsive rounded shapes.
Yes. The output uses standard border-radius declarations that work in modern browsers without extra libraries.
A border radius generator is a small visual tool for creating rounded CSS corners without guessing values by hand. The CSS border-radius property looks simple at first, but it becomes harder to tune when a design needs four different corner values, reusable card styles, pill buttons, soft image frames, or asymmetric shapes. This generator gives you direct controls for each corner and updates the preview immediately so you can see the effect before copying code.
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Rounded corners are not only decorative. They affect how a component feels, how it groups content, and how users understand interactive elements. A small radius can make a dense admin panel look cleaner. A large radius can make a call-to-action button feel friendly and tappable. Asymmetric radius values can create a more editorial or branded look for banners, feature cards, and image treatments.
Many design systems define radius tokens such as small, medium, large, full, or pill. Those values are then reused across buttons, forms, cards, modals, and menus. A visual generator helps you discover a good value before turning it into a reusable token. For example, you may decide that cards use 16px, dialogs use 24px, and badges use 999px.
The simplest border-radius declaration uses one value, such as border-radius: 12px;. That applies the same rounding to all four corners. You can also use four values in clockwise order: top-left, top-right, bottom-right, and bottom-left. For example, border-radius: 32px 8px 32px 8px; creates alternating rounded corners. This tool outputs both shorthand and expanded declarations so you can pick the format that best fits your project.
Pixels are the most common unit because they are predictable and easy to match with design files. Rem values are useful when you want radius to scale with the root font size. Percentage values are useful for circles, ovals, avatars, and responsive shapes because the curve depends on the element width and height.
Use consistent values across similar components. If every card uses a different radius, a layout can feel accidental. Use larger radii for bigger surfaces and smaller radii for compact controls. Avoid extremely large values on small rectangular elements unless you intentionally want a pill shape. When using images, test how the radius crops corners against the image content, especially if important details appear near the edges.
For accessibility, remember that rounded corners do not replace clear focus states. Buttons, links, and form fields should still have visible focus outlines and enough color contrast. Border radius is a visual styling tool, while usability depends on spacing, labeling, contrast, and keyboard support.