Square repeat tiles the design in a straight grid. Half-drop repeat offsets alternating columns down by half the tile height. Brick repeat offsets alternating rows sideways by half the tile width, like stacked bricks.

No, original pixels are copied as-is with no quality loss. The overall image dimensions simply grow with more repeats.

No, it simply tiles your original design as-is — it doesn't auto-heal seams. For seams to look natural, the original design itself needs to be drawn so its edges already match.

Up to 10 times each horizontally and vertically. Beyond that, the result image would become too large and could strain the browser.

JPG compression can introduce faint color bleeding at edges, which can make tile seams look messy. A transparent-background PNG avoids this issue.

Tiling a transparent PNG as-is produces a transparent result. Filling a background color lets you preview how it looks against a specific color, or download a finished image with that background baked in. Choosing 'Keep Transparent' downloads it as-is, with no background.

Mirror mode flips every other column (or row), alternating 'normal-flipped-normal-flipped...'. For this pattern to stay consistent when the textile is tiled again (e.g., continuously as a roll), the total count must be even — an odd count would break the pattern right at the seam where 'flipped-flipped' or 'normal-normal' would end up next to each other.