CSS Background Pattern Generator [2025]

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Generate beautiful, lightweight CSS background patterns for your website. Customize colors, sizes, and more with instant previews.

✓ Pure CSS Patterns✓ Live Preview✓ Customizable Variables✓ Multiple Styles✓ Copy CSS Code
20px100px
/* --- CSS Background: Plaid --- */
/* Default Customizable CSS Variables (can be overridden) */
/*
  --bg-color1: #4f46e5;
  --bg-color2: rgba(0, 0, 0, 0.1);
  --bg-color3: rgba(255, 255, 255, 0.1);
  --bg-size: 40;
*/

body {
    --bg-color1: #4f46e5; /* Base */
    --bg-color2: rgba(0, 0, 0, 0.1); /* Darker stripe */
    --bg-color3: rgba(255, 255, 255, 0.1); /* Lighter stripe */
    --bg-size: 40px;
  
    background-color: var(--bg-color1);
    background-image:
      linear-gradient(var(--bg-color2) 1px, transparent 1px),
      linear-gradient(90deg, var(--bg-color2) 1px, transparent 1px),
      linear-gradient(var(--bg-color3) 2px, transparent 2px),
      linear-gradient(90deg, var(--bg-color3) 2px, transparent 2px);
    background-size: calc(var(--bg-size) / 2) calc(var(--bg-size) / 2), /* Thin grid */
                     calc(var(--bg-size) / 2) calc(var(--bg-size) / 2),
                     var(--bg-size) var(--bg-size), /* Thick grid */
                     var(--bg-size) var(--bg-size);
  }

Apply this CSS to your desired HTML element (e.g., body, div). You can override the CSS variables globally or on the specific element.

What are CSS Background Patterns?

Instead of using large image files, you can create intricate and scalable background patterns using only CSS, primarily leveraging properties like `background-image` with `linear-gradient()` and `radial-gradient()`, along with `background-size` and `background-position`.

These patterns are resolution-independent, meaning they look sharp on any screen. They are also extremely lightweight, reducing page load times compared to image-based backgrounds.

This generator provides various preset patterns and allows you to customize key aspects like colors and dimensions using CSS variables, making integration into your projects seamless.

How It Works

  1. Select a Pattern: Choose a base pattern from the dropdown (e.g., Polka Dot, Stripes, Checkerboard).
  2. Customize (Optional): If the pattern has customizable variables (like colors or sizes), adjust them using the controls. The preview updates in real-time.
  3. Preview: See the generated background applied live in the preview area.
  4. Copy CSS: Click the "Copy" button to get the complete CSS code, including the necessary CSS variables with their default values.
  5. Apply to Element: Paste the copied CSS into your stylesheet and apply it to the desired HTML element (like `body`, a `div`, or a specific section) using its class or ID. You can override the default variable values in your own CSS for further customization.

Frequently Asked Questions

How do CSS gradients create patterns?

By layering multiple `linear-gradient()` or `radial-gradient()` functions within the `background-image` property and controlling their `background-size` and `background-position`, you can create repeating geometric shapes like stripes, dots, checks, and much more complex designs.

Are these patterns performant?

Yes, generally very performant. Since they are rendered by the browser's CSS engine and don't require downloading image assets, they are usually much faster to load than image backgrounds. Very complex layered gradients *could* impact rendering performance slightly on low-powered devices, but most common patterns are highly efficient.

Can I combine these patterns?

Absolutely! The `background` property in CSS allows layering multiple backgrounds (including gradients and images). You could potentially take the gradient definitions from two different patterns generated here and combine them in your own CSS, adjusting sizes and positions for unique effects.

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