Create pure CSS background patterns (checkerboard, stripes, polka dots, zigzag) without images.
Choose checkerboard, stripes, polka dots, or zigzag, set colors and spacing, and this generator writes the CSS gradient declarations that draw it - no image file involved. It layers linear-gradient, repeating-linear-gradient, or radial-gradient functions with hard color stops so edges stay crisp instead of fading, then sets background-size to define the repeat tile. The part people miss: the pattern is drawn relative to the element's own background box, so padding, background-origin, and box-sizing choices can shift or crop it in ways the fixed-size preview doesn't reveal.
A concrete input and expected output from the current implementation.
Input
Pattern: Stripes | Color A: #0F172A | Color B: #F8FAFC | Stripe width: 12px | Angle: 45deg
Expected output
.pattern {
background-image: repeating-linear-gradient(
45deg,
#0F172A 0px,
#0F172A 12px,
#F8FAFC 12px,
#F8FAFC 24px
);
} repeating-linear-gradient repeats its color-stop sequence every 24px (0-12px in Color A, 12-24px in Color B) along a 45-degree axis, producing 12px-wide diagonal stripes that alternate between the two colors indefinitely across the element.
Each pattern is built from CSS gradient functions - linear-gradient, repeating-linear-gradient, or radial-gradient - with two color stops placed at the same offset, such as #000 25%, transparent 25%. That zero-width transition creates a sharp edge instead of a blend, which is what makes the gradient read as a stripe, dot, or diamond rather than a soft glow.
background-size sets the width and height of one repeat unit, and the browser tiles it automatically across the element. Patterns needing more than one motif per tile, like checkerboard or zigzag, stack several gradient layers in one background-image list and offset each with its own background-position value so the layers interlock into a single repeating tile.
No. The output is CSS only - gradient functions painted by the browser - so there's no PNG, SVG, or other asset to save, upload, or reference. Paste the generated CSS into a stylesheet or style attribute and the pattern renders wherever that background-image rule applies.
It tiles to fill whatever element you apply it to, but the repeat unit itself stays the fixed size you set, such as 20px. A larger container just shows more repetitions, not a bigger single motif - change the tile size in the generator if you need the pattern coarser or finer.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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