SEAMLESS PATTERN TESTER · Small tile. Endless possibilities.
Brick repeat
Upload a pattern tile and see how it repeats. Inspect edge joins, compare repeat modes, and export a clean PNG — all in your browser.
Dashed guides are preview-only and never appear in downloads.
PNG export size
PNG · 256–4096 pxTile width is relative to the preview width; repeat exports keep the same horizontal coverage.
Ready to test a pattern.
Repeat mode
Small tile. Endless possibilities.
Straight repeat
Upload a pattern tile and see how it repeats. Inspect edge joins, compare repeat modes, and export a clean PNG — all in your browser.
↗02Half-drop repeat
Upload a pattern tile and see how it repeats. Inspect edge joins, compare repeat modes, and export a clean PNG — all in your browser.
↗03Brick repeat
Upload a pattern tile and see how it repeats. Inspect edge joins, compare repeat modes, and export a clean PNG — all in your browser.
↗04Mirrored repeat
Upload a pattern tile and see how it repeats. Inspect edge joins, compare repeat modes, and export a clean PNG — all in your browser.
↗How it works
A straight repeat places identical copies in aligned rows and columns. Half-drop shifts alternate columns vertically by half a tile. Brick shifts alternate rows horizontally by half a tile. Mirrored repeat flips alternate tiles horizontally and vertically.
Edge difference compares sampled opposite-edge RGB values after compositing transparency on white. Values range from 0% (matching sampled pixels) to 100% (maximum difference). Low values do not detect all visual problems; inspect lines, shapes and tonal changes in the repeat preview too.
Guides
Repeat modes explained
A straight repeat places identical copies in aligned rows and columns. Half-drop shifts alternate columns vertically by half a tile. Brick shifts alternate rows horizontally by half a tile. Mirrored repeat flips alternate tiles horizontally and vertically.
↗02Finding pattern seams
The centered seam view wraps the source tile by half its width and height. The original left/right and top/bottom joins move into the center, making abrupt changes easier to inspect. This view does not apply the selected repeat mode or repair the image.
↗03Exporting pattern PNGs
Repeat exports are PNG files from 256 to 4096 pixels on each side. They keep the preview’s horizontal pattern coverage; changing the export aspect ratio reveals more or less vertical area. Guides and the checkerboard are never included. Transparent background preserves transparency.
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