Free SVG Pattern Generator — Seamless CSS Background Patterns Online

Why Use an SVG Background Pattern Generator?

SVG background patterns are the professional standard for high-performance web design. Unlike raster images (PNG or JPEG), an SVG pattern is described by a mathematical formula — meaning it scales to any screen resolution without losing sharpness, from a mobile display to a 5K monitor.

More importantly, a full-coverage geometric background texture that would weigh 400–800KB as a JPEG takes less than 2KB as an SVG. That difference directly improves your site's Largest Contentful Paint (LCP) score and Core Web Vitals, both of which Google uses as ranking signals.

The technical advantages over raster textures:

• ~500 bytes to 2KB of inline SVG or CSS (vs hundreds of KB for JPEG)
• Scales infinitely — sharp on any screen density including Retina
• Colors can be CSS variables, changeable at runtime
• Rendered by the GPU with hardware acceleration
• No HTTP request when embedded as a Data URI

How SVG <pattern> Works

<svg xmlns="http://www.w3.org/2000/svg">
    <defs>
        <pattern id="dots" x="0" y="0" width="20" height="20" patternUnits="userSpaceOnUse">
            <circle cx="10" cy="10" r="2" fill="#3b82f6" opacity="0.3"/>
        </pattern>
    </defs>
    <rect width="100%" height="100%" fill="url(#dots)"/>
</svg>

The <pattern> element defines a tile — width and height set the tile size. The patternUnits="userSpaceOnUse" means dimensions are in absolute pixels. The tile repeats seamlessly to fill any space.

14 Geometric Pattern Types

The generator includes 14 ready-to-use geometric shapes:

• Classic patterns: dots, grid, lines, crosses, bricks, triangles, hexagons
• Extended patterns: diamonds (corner-to-corner rotated squares for a lattice effect), zigzag (herringbone W-wave), circles (evenly spaced rings), stripes (clean parallel bands), stars (4-pointed filled stars)

Every pattern type shares the same controls — Tile Size, Stroke Thickness, Rotation, and Opacity — so you can switch between them without resetting your color scheme. All geometry scales proportionally with tile size, so patterns look sharp and balanced at every density.

How to Create a CSS Background Pattern in 3 Steps

1. Pick a pattern type from the selector grid — try hexagons for a tech dashboard or dots for a clean landing page background.
2. Adjust colors and controls — set foreground and background colors, tile size (smaller tiles = denser pattern), and opacity (5–15% for subtle micro-texture, higher for bold graphic effect).
3. Export — click Copy CSS to get a ready-to-paste background-image Data URI, or click Download SVG for an external asset file.

Paste the CSS into any stylesheet and the seamless repeating pattern renders instantly — no additional libraries, no build step, no HTTP request for an image file.

Common Pattern Types with Code Examples

Dot grid

<pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse">
    <circle cx="10" cy="10" r="1.5" fill="#94a3b8"/>
</pattern>

Subtle dot grids are widely used in dashboard and data visualization interfaces to suggest structure without adding visual weight.

Line grid (graph paper)

<pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse">
    <path d="M 40 0 L 0 0 0 40" fill="none" stroke="#e2e8f0" stroke-width="1"/>
</pattern>

Diagonal lines (hatching)

<pattern id="hatch" width="8" height="8" patternTransform="rotate(45 0 0)" patternUnits="userSpaceOnUse">
    <line x1="0" y1="0" x2="0" y2="8" stroke="#94a3b8" stroke-width="1"/>
</pattern>

The patternTransform="rotate(45 0 0)" rotates the tile while keeping the coordinate system consistent.

Checkerboard

<pattern id="checker" width="20" height="20" patternUnits="userSpaceOnUse">
    <rect width="10" height="10" fill="#f1f5f9"/>
    <rect x="10" y="10" width="10" height="10" fill="#f1f5f9"/>
</pattern>

Hexagon grid

<pattern id="hex" width="28" height="48.5" patternUnits="userSpaceOnUse">
    <polygon points="14,0 28,8 28,24 14,32 0,24 0,8" fill="none" stroke="#e2e8f0"/>
    <polygon points="14,32 28,40 28,56 14,64 0,56 0,40" fill="none" stroke="#e2e8f0" transform="translate(-14,24)"/>
</pattern>

Embedding SVG Patterns in CSS

As a CSS Data URI

.hero {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cdefs%3E%3Cpattern id='d' width='20' height='20' patternUnits='userSpaceOnUse'%3E%3Ccircle cx='10' cy='10' r='1.5' fill='%2394a3b8'/%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23d)'/%3E%3C/svg%3E");
}

The SVG is URL-encoded (spaces become %20, # becomes %23, ' becomes %27, <> become %3C%3E). The generator handles this encoding automatically. Use our URL Encoder if you need to encode a hand-written SVG, or our Base64 Encoder if you prefer Base64 data URIs.

As a standalone SVG file

.hero {
    background-image: url("/patterns/dots.svg");
    background-repeat: repeat;
    background-size: 20px 20px; /* Match the pattern tile size */
}

Standalone files are cacheable — better for patterns used across many pages.

Export SVG Patterns as PNG for Figma and Design Tools

Many design workflows require a raster image rather than a vector file. Social media graphics, Figma mockup overlays, Canva uploads, and print assets all need PNG.

The Download PNG button renders your tile onto a hidden HTML canvas at your chosen resolution — 512px, 1024px, or 2048px — tiles it to fill the full canvas, and triggers a download. The entire process uses the browser's native Canvas 2D API with zero server involvement.

If your pattern has a transparent background (toggle the Transparent Background switch), the exported PNG preserves the alpha channel, so it composites cleanly over any color or image in Figma or Photoshop without a white box.

Save and Reuse Custom Pattern Presets

Finding the perfect pattern configuration for your brand takes iteration. The built-in presets — Blueprint (white grid on navy), Polka (pink dots), Minimal (grey lines) — are useful starting points, but the real power is in saving your own.

Click Save Current in the Presets panel, name the configuration, and it is written to your browser's localStorage immediately. Saved presets persist across sessions with no account required. Maintain a personal library of brand-specific backgrounds — a dark-mode blueprint, a light-mode grain texture, a bold hero pattern — and switch between them instantly.

Share Patterns Instantly with a Link

Every setting you adjust — pattern type, colors, tile size, stroke thickness, rotation, opacity — is encoded into the page URL in real time. When you click Share, the full URL is copied to your clipboard. Anyone who opens that link lands on the exact same configuration, ready to export or continue editing.

No account, no saved project, no cloud storage — just a URL. This makes it easy to share design options with clients or request feedback from teammates.

Combining with Gradients and Glass

Layer patterns with other background effects:

.hero {
    background:
        /* Pattern on top */
        url("data:image/svg+xml,...") center / 20px 20px,
        /* Gradient below */
        linear-gradient(135deg, #1e1b4b, #312e81);
}

Layer over glassmorphism from our Glass & Neumorphism Generator by applying the pattern with low opacity to the glass card's background or a pseudo-element.

Opacity and Micro-Texture

The key to professional pattern use is restraint. Patterns at full opacity compete with content. Patterns at 5–15% opacity add subtle texture that enriches the layout without distracting:

.bg-pattern {
    position: relative;
}

.bg-pattern::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,...");
    opacity: 0.07; /* Micro-texture at 7% */
    pointer-events: none;
}

Always verify text readability over patterns with our Contrast Checker. Use our CSS Formatter to organize pattern declarations alongside your other background CSS, and our Gradient Generator to build the gradient layer that goes beneath.

SVG Pattern vs PNG Background: Which Should You Use?

Use SVG patterns for web backgrounds. Export PNG only when the design tool or context requires raster.

Privacy-First: Everything Runs in Your Browser

Many online pattern generators upload your configuration to a server to render the SVG or PNG. This tool does not. Every calculation — SVG generation, Base64 encoding, canvas rendering, preset storage — happens entirely in your browser's memory. Your colors, brand tokens, and design decisions never leave your device.

The PNG export uses the browser's Canvas API, the CSS encoding uses the native btoa() function, and presets use localStorage — all standard browser APIs with no cloud dependency. For a complete privacy-first design workflow, pair this generator with our Soft UI Designer and Contrast Checker.