CSS Pattern Generator
Build a tileable background pattern from pure CSS gradients, no image file needed, and copy the CSS.
How it works
Each preset builds one or two CSS linear-gradient() or
radial-gradient() layers with hard color stops (no soft blend between them),
which is what turns a smooth gradient into a crisp repeating shape. The
background-size is set to exactly one tile's dimensions so the pattern
repeats with no visible seam at the edges, and dots/grid patterns additionally offset
their background-position so the shapes land centered rather than clipped at the corner.
Everything is generated CSS, applied to the preview box's own background
style. Nothing is uploaded, and no image request is made.
Common questions
Does this use an image file?
No, every pattern is built from CSS gradients layered as a repeating background, no image request at all. That keeps the pattern crisp at any zoom level and any element size, since it's vector math, not a raster tile.
Will the pattern tile seamlessly?
Yes, the background-size is set to exactly one repeat unit, so the pattern repeats edge to edge with no visible seam, at any element size.
Is this sent anywhere?
No, the pattern is generated and previewed entirely in your browser's CSS engine. Nothing is uploaded.