CSS Background Pattern Generator

CSS patterns use multiple background layers with gradients (linear-gradient, radial-gradient, repeating-linear-gradient) stacked on top of each other. By carefully sizing and positioning each gradient layer with background-size and background-position, repeating geometric shapes are formed.

Yes. Apply the pattern CSS to the same element that has a background-image by listing the pattern gradients before the image URL in the background property. The pattern layers render on top of the image. Use semi-transparent colors in the pattern for an overlay effect.

CSS patterns are generally very performant since they require no HTTP requests and are rendered by the browser's GPU. However, extremely complex patterns with many gradient layers can cause slight rendering overhead on low-end devices. For most use cases, they are lighter than image-based patterns.