A sheet of paper holds far more cells than a phone can show, and an SVG has no pixel budget — so the print size is a free number here, not the game's preset ladder.
Every maze is built from its seed. The same seed always gives the same maze — on this device, on any other, and next year.
Pick a shape and a size. Square mazes have four walls per cell; hexagons have six, which makes junctions harder to read at a glance and the shortest route about half as long for the same number of cells.
Character is the growing-tree selection rule. Long corridors is the recursive backtracker — few branches, one long snake, a solution about 4.7× the width plus the height. Lots of branches is closer to Prim's — junctions everywhere and a much more direct route.
Save SVG gives you a vector file: it prints crisply at any size, from a postcard to a poster. The solution is always a separate file, never baked into the maze you hand somebody.
Copy picture puts the maze on the clipboard so you can paste it straight into a document, an email or a chat. It goes as a picture where the browser allows that, and otherwise as the drawing itself — which is what design apps like Figma, Illustrator and Inkscape would rather have anyway. Saving the file always works, whatever the browser thinks of clipboards.
Nothing here is uploaded and nothing is stored. The file is built when you ask for it, handed over, and dropped.