CSS Border Generator — Free Online Tool

By | August 26, 2026

Use CSS Border Generator to design and copy CSS border code in seconds — no coding required.

Border Settings

Apply to sides
Border Style
Border Width4px
Border Color
Border Radius0px

Generated CSS

.element {
  border: 4px solid #0F0D72;
}

How It Works

CSS borders are drawn with three properties combined into one shorthand: border-width, border-style, and border-color. This tool builds that shorthand for you as you adjust the controls, and outputs the exact border: [width] [style] [color]; line to paste into your stylesheet.

Selecting a single side (Top, Right, Bottom, or Left) instead of “All” switches the output to the matching longhand property — border-top, border-right, border-bottom, or border-left — which lets you style one edge of an element without affecting the others. Adding a radius value appends a separate border-radius line, since corner rounding is a distinct property from the border itself.

When to Use a CSS Border Generator

  • Card and container styling — quickly prototype hover states, panel dividers, or content-block outlines without writing values from memory
  • Button design — outlined and ghost-button styles rely on precise border-width and color pairing to stay legible against different backgrounds
  • Image framing — a border with rounded corners is a common way to frame thumbnails, avatars, or gallery images in WordPress themes and page builders
  • Table and form styling — single-side borders (e.g. border-bottom only) are frequently used for input underlines and table row separators

FAQ

How do you add a border in CSS?
Use the border shorthand property, combining width, style, and color in one line — for example, border: 2px solid #000000;. This applies the same border to all four sides of an element.

What are the different CSS border styles?
CSS3 defines nine border-style values: solid, dashed, dotted, double, groove, ridge, inset, outset, and none. Each renders differently — groove and ridge, for instance, use light and shadow to create a 3D effect, while double draws two parallel lines with a gap between them.

How do I make a border only on one side in CSS?
Use the side-specific longhand properties — border-top, border-right, border-bottom, or border-left — instead of the border shorthand. Each accepts the same width/style/color syntax but only affects that one edge.

Is there a difference between an HTML border and a CSS border?
Yes. Older HTML supported a border attribute directly on elements like <table> or <img>, but this attribute is deprecated in modern HTML standards. CSS borders, applied through the border property in a stylesheet or style attribute, are the current standard and offer far more control over width, style, color, and per-side customization.

How do you round the corners of a CSS border?
Add the border-radius property alongside your border declaration — for example, border-radius: 8px; rounds all four corners equally. Larger values produce more rounding, and a value of 50% on a square element creates a full circle.

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