Border Generator

CSS Tools

Design CSS borders visually with per-side widths, eight border styles, color with opacity, and per-corner border-radius. Live preview, real use-case demos, and one-click copy of CSS or Tailwind utility classes.

border generator

Read the full guide

What this tool does

Border Generator provides a focused interface for Independent widths for top, right, bottom and left. It also explains Entity relationship: side width + style + color + corner radius → border declarations so the result can be checked against the current source value and controls. Enter the source value or settings, adjust controls, and verify the result before using it. Keep the original input visible for comparison.

Open Border Generator and work with the result now.

1. Controls

Border Widthpx

Border Style

Border Colorrgba(99, 102, 241, 1)

Opacity100%

Per-side Width

Toppx

Rightpx

Bottompx

Leftpx

Border Radius

Link all corners

Top Leftpx

Top Rightpx

Bottom Rightpx

Bottom Leftpx

Presets

2. Live Preview

Border Preview

This is a live preview of your custom border styles.

Use CasesLive applied

Button

Card

Type here…

Input

★

Avatar

NEW

Tag

Hint text

Tooltip

Dialog

Modal

Image

Tip: Fine-tune per-side width and radius for custom shapes.

3. Generated CSS

CSS

.border-box {
  border-width: 3px 6px 3px 6px;
  border-style: solid;
  border-color: rgba(99, 102, 241, 1);
  border-radius: 16px 16px 24px 24px;
}

Tailwind CSS (v3+)

border-[3px_6px_3px_6px] border-solid border-[rgba(99,102,241,1)] rounded-[16px_16px_24px_24px]

Add the class to any element to apply these borders.

How Border Generator works

Choose a style

Select border style, color, and base width.

Adjust width & radius

Fine-tune per-side width and corner radius.

Preview live

See your border updates instantly in real-time.

Copy the code

Copy clean CSS or Tailwind classes for your project.

How to use

Enter the source value or choose the starting settings. The current interface supports: Independent widths for top, right, bottom and left.
Adjust the relevant controls and let the result update. The current interface supports: solid, dashed, dotted, double, groove, ridge, inset and outset styles.
Review the result, then use the copy, download or export action that is available in the interface. The current interface supports: Independent radius values for all four corners; Live preview with CSS and Tailwind output; Entity relationship: side width + style + color + corner radius → border declarations.

Supported inputs and controls

Independent widths for top, right, bottom and left
solid, dashed, dotted, double, groove, ridge, inset and outset styles
Independent radius values for all four corners
Live preview with CSS and Tailwind output
Entity relationship: side width + style + color + corner radius → border declarations

When to use this tool

Border Generator provides a focused interface for Independent widths for top, right, bottom and left. It also explains Entity relationship: side width + style + color + corner radius → border declarations so the result can be checked against the current source value and controls. The current interface supports: solid, dashed, dotted, double, groove, ridge, inset and outset styles; Entity relationship: side width + style + color + corner radius → border declarations.
Use Border Generator while implementing or reviewing frontend styles and components.
Compare the preview and generated code before adding the result to a production stylesheet.

Common mistakes and troubleshooting

Check the input

Confirm that the CSS value or source code is complete and entered in the intended control. The current interface supports: Independent widths for top, right, bottom and left.

Check the context

Check value order, units, browser-supported syntax and the effect of every enabled option. The current interface supports: solid, dashed, dotted, double, groove, ridge, inset and outset styles.

Check the result

Compare the preview with the generated code, then test that code in the component where it will be used. The current interface supports: Independent radius values for all four corners; Live preview with CSS and Tailwind output; Entity relationship: side width + style + color + corner radius → border declarations.

Frequently asked questions

What does Border Generator do?

Border Generator brings Independent widths for top, right, bottom and left and Independent radius values for all four corners into one focused workflow.

How do I use Border Generator?

Start with Independent widths for top, right, bottom and left; configure solid, dashed, dotted, double, groove, ridge, inset and outset styles; then check Independent radius values for all four corners before using Live preview with CSS and Tailwind output.

Which inputs or controls are supported?

The verified scope is limited to the visible controls, including Independent widths for top, right, bottom and left and Live preview with CSS and Tailwind output.

Why does the result look wrong?

Confirm Independent widths for top, right, bottom and left, review solid, dashed, dotted, double, groove, ridge, inset and outset styles, and validate the result against Entity relationship: side width + style + color + corner radius → border declarations.

Which related tool should I use next?

Continue with CSS Beautifier, Box Shadow Generator, CSS Filter Generator according to the next task in your workflow.

Continue in the same topic with these AppKiro tools:

CSS Beautifier Box Shadow Generator CSS Filter Generator

Use Border Generator as one focused step, then verify the result in its final context.