Seamless Pattern Tester

A repeating pattern only works if the joins between copies are invisible. Fabric prints, wallpapers, website backgrounds, 3D materials and game textures all depend on tiles that repeat without a visible grid. This tool repeats your tile across a surface, helps you spot problems and offers two ways to fix the edges.

The tiled preview

Drop an image and it is repeated across the preview like wallpaper. Adjust the tile size from 40 to 600 pixels to see the pattern at different scales, as it would appear on a large wall, a small fabric swatch or a distant 3D surface. Problems that are invisible in a single tile become obvious when it repeats.

What to look for

Two things give a tile away. First, straight lines where tiles meet, caused by edges whose colors or details do not match the opposite side. Second, a distinctive spot, such as a dark knot in wood or a single bright leaf, that repeats in an obvious grid. A good tile has neither: the eye travels across the surface without noticing where one copy ends.

Shift by half a tile

The edges of a tile are where problems hide. “Shift by half a tile” moves the image by half its width and height, so the four original edges meet in a cross in the middle of each tile, where they are easy to inspect. Textile and texture artists use the same offset trick in image editors.

Fix 1: blend the edges

The blend fix shifts the tile by half, so its new outer edges wrap perfectly, and then blends the unshifted original back over the middle cross with soft edges. The result keeps the character of the original texture while hiding the join. The blend width sets how wide the soft band is, from 4 to 45 percent of the tile; organic textures such as grass, stone and clouds tolerate wide blends, detailed patterns need narrower ones.

Fix 2: mirror 2 × 2

The mirror fix builds a new tile from four copies, flipped horizontally and vertically, so every edge meets its own reflection. The edges always match perfectly. The downside is visible symmetry, which suits abstract designs, marble, fabric and kaleidoscopic patterns but can look artificial on natural textures.

Downloading the tile

The fixed tile downloads at full resolution, ready to use as a repeat in a textile print file, as a CSS background with background-repeat, or as a texture in a 3D or game engine with wrapping enabled.

Tips for better tiles

Start from evenly lit photos without strong shadows from one side, because a lighting gradient creates a visible repeat. Square photos work best. Crop away vignetting and lens distortion before testing. For fabric, check the tile at the actual repeat size it will be printed.

Privacy

Designs and textures are processed in your browser and never uploaded.

Where repeating tiles are used

Textile printers repeat a design across meters of fabric, wallpaper makers across whole walls, and websites use small tiles as CSS backgrounds that fill any screen size. In 3D and game engines, tiling textures cover floors, terrain and walls with a single small image, saving memory while keeping surfaces detailed.

Related tools

For symmetric patterns and kaleidoscopes, use the Mirror Image Effect. To even out color casts in texture photos, try the White Balance Fixer. For precise square crops, Crop Image helps.