CSS Background Pattern Generator creates repeating geometric patterns using only CSS gradients — no images required. Choose from checkerboard, stripes, dots, herringbone, triangles, and other patterns, adjust colors and sizes, and get the CSS background-image, background-size, and background-color properties ready to copy. The pattern renders in any browser using linear-gradient and radial-gradient.
CSS background patterns use the repeat behavior of background-image with carefully sized gradients to create geometric patterns without any image files. A checkerboard uses two overlapping linear-gradient backgrounds offset by half the tile size. Dots use radial-gradient with a transparent background. Stripes use a linear-gradient at 45° with hard color stops (no blur radius). These techniques avoid image HTTP requests and scale to any DPI without pixelation.
Common uses: hero section backgrounds, card backgrounds, texture overlays, loading state placeholders, and decorative UI elements. CSS patterns are fully resolution-independent (vector-like), highly customizable via CSS custom properties, and have zero additional HTTP requests. For complex patterns, SVG backgrounds (background-image: url('data:image/svg+xml,...')) are an alternative that supports more shapes.
Simple checkerboard
Result: background-image: linear-gradient(45deg,#333 25%,transparent 25%)... (4 gradient layers)
Diagonal stripes
Result: background: repeating-linear-gradient(45deg,#0d1117,#0d1117 10px,#1f2937 10px,#1f2937 20px)
Dot grid
Result: background-image: radial-gradient(#666 1px, transparent 1px); background-size: 20px 20px
How do CSS gradient patterns work?
CSS allows multiple background-image values comma-separated. Each value is a gradient that tiles. By using hard color stops (no transition, e.g., stop at 50% and restart at 50%), the gradient creates geometric shapes. The background-size controls the tile size. Multiple overlapping gradients at different positions and sizes create complex patterns. This is pure CSS — no images, no SVG — just math with gradients.
What is the difference between linear-gradient and repeating-linear-gradient?
linear-gradient creates a single gradient fill. repeating-linear-gradient repeats the gradient pattern from 0 to background-size. For most stripe patterns, repeating-linear-gradient is simpler — you define one stripe cycle and it tiles automatically. With linear-gradient stripes, you control tiling via background-size and need to ensure the gradient fits exactly in the tile. Either can work; repeating-linear-gradient is more intuitive for repeating patterns.
Can CSS background patterns be used on dark themes?
Yes — change the two colors to suit the dark theme. For subtle dark patterns: use colors close to the background (e.g., #0d1117 and #161b22 for a near-invisible checkerboard). For more visible patterns: use higher contrast. Semi-transparent patterns work well for overlays: rgba(255,255,255,0.05) on a dark background gives a very subtle texture. Mix-blend-mode on the pattern element can also create interesting overlay effects.
What are the performance implications of CSS patterns?
CSS gradients are rendered by the GPU on every paint — they have no file size cost but do have a rendering cost. Simple patterns (1-2 gradients) are nearly free. Complex patterns (8+ gradients for herringbone or diamond effects) may cause repaint overhead if the element is frequently resized or if many instances are on screen simultaneously. For most use cases (a single background pattern), performance impact is negligible.
Is it better to use CSS patterns or SVG backgrounds?
CSS gradient patterns: simple geometry (stripes, dots, checkerboard), no extra file, easily animated with custom properties. SVG backgrounds: complex shapes (waves, honeycombs, complex geometry), better authoring tools, can include text and paths, smaller code for complex patterns. For simple geometric patterns, CSS gradients are preferable. For complex patterns, inline SVG as a data URI is often more maintainable.