Generator Tools

CSS Outline Generator

Build CSS outline shorthand with live preview. Tune width, style, color, and outline-offset, then copy CSS, focus-visible, or Tailwind output.

Quick presets

Live preview

Background

Preview

Focus ring demo

Renders the outline as a button focus ring. Tab away to see the unfocused state.

CSS shorthand

outline: 2px solid #3b82f6;

Outline offset

outline-offset: 2px;

Longhand

outline-width: 2px;
outline-style: solid;
outline-color: #3b82f6;
outline-offset: 2px;

Tailwind v3+ class

outline-[2px] outline-solid outline-[#3b82f6] outline-offset-[2px]

Tailwind ships preset classes for solid, dashed, dotted, and double outlines. Arbitrary-value brackets carry custom widths and colors.

Outline controls

Outline width

2px

Outline offset

2px

Positive paints outside the border edge. Negative paints inside.

Style

Browsers render groove, ridge, inset, and outset by lightening or darkening the outline color in two-tone strokes. Pair with a wider outline width to make the effect visible.

Outline color

Accepts any CSS color. Hex inputs are validated; named keywords and rgba()/hsl() work in the longhand if pasted into your stylesheet.

Shape fill

Label color

Shape width

240px

Shape height

120px

Shape corner radius

12px

Rule for a class selector

Drop into a stylesheet under .btn or any class you choose.

.btn {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

Accessible :focus-visible variant

Hides the ring for mouse clicks and shows it for keyboard focus.

.btn:focus {
  outline: none;
}

.btn:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

Copy-ready summary

Shorthand, longhand, focus-visible, and Tailwind in one block.

CSS Outline Generator

CSS shorthand
  outline: 2px solid #3b82f6;
  outline-offset: 2px;

Longhand
  outline-width: 2px;
  outline-style: solid;
  outline-color: #3b82f6;
  outline-offset: 2px;

Accessible :focus-visible variant
  .btn:focus {
    outline: none;
  }
  
  .btn:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
  }

Tailwind v3+ class
  outline-[2px] outline-solid outline-[#3b82f6] outline-offset-[2px]

Outline vs border, at a glance

No layout shift. Outlines are painted outside the border edge and never push neighbors around, which is exactly what focus indicators need.
Negative offset is allowed. outline-offset can be negative to paint the line inside the element, useful for inner highlights.
Uniform on four sides. Outline does not support per-edge widths or colors. Reach for border or box-shadow when those are required.
Pair with :focus-visible. Removing outlines for mouse clicks while keeping them for keyboard focus is the modern accessibility pattern. Never use outline: none alone.
Respects border radius. Modern Chromium, Firefox, and Safari follow the element's border-radius when drawing the outline.
Local only. The preview, CSS, and summary are computed in your browser. Nothing you type is uploaded.

How to use

Pick a preset to start (Focus ring blue is a good baseline) or click Reset to begin from defaults.
Adjust outline-width, outline-style, outline-color, and outline-offset. Switch the width or offset unit between px, em, and rem as needed.
Toggle Focus ring demo on to render the preview as a button that auto-focuses, then tab away to compare the focused and unfocused states.
Use the Background buttons to verify the outline reads well on dark, light, and checker surfaces.
Copy the CSS shorthand, the rule for a class selector, the accessible :focus-visible variant, or the Tailwind class, depending on your stack.

About this tool

CSS Outline Generator builds the `outline` shorthand and `outline-offset` from independent width, style, and color controls, then shows a live preview rendered with the exact CSS you will copy. Output formats include the shorthand, the per-property longhand, a class rule, an accessible `:focus-visible` variant (so the ring shows for keyboard focus but not mouse clicks), and a Tailwind v3+ arbitrary-value class. The tool also exposes a focus ring demo: toggle Focus ring on to render the preview as a button that auto-focuses, so you can see exactly how the outline reads as a real focus indicator. Outline differs from border in three ways that the tool surfaces: it does not affect layout (so neighbors never shift when focus appears), it accepts a positive or negative offset (negative paints the line inside the element edge), and it is uniform on all four sides (per-edge outlines do not exist in CSS). Width units cover px, em, and rem with sensible ranges and rounded values; offset supports the same units and a negative range for inner highlights. Eight outline styles are available (solid, dashed, dotted, double, groove, ridge, inset, outset) with one-click presets for the common patterns: blue focus ring, amber high-contrast focus ring, double decorative frame, magenta layout debug, inset hint, and dotted card. The preview canvas can be dark, light, or checker so you can verify contrast against the surfaces your component will actually appear on. Built for designers and developers who want a quick accessible focus indicator without typing offsets by hand or guessing how the line will read at different widths, and for anyone migrating from `outline: none` to a focus-visible pattern. All controls, preview, and CSS generation run locally in your browser, so nothing you enter is uploaded.

Free to use. Works in your browser. No signup, no login.

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