Generate square / dot / hex / isometric / rice-cell grid paper, print or download as SVG / PNG.
Pick a grid type, set cell size / line width / color / paper size / margin, then click Generate. Use Print to send straight to paper (only the grid is printed, buttons and chrome are hidden). Download SVG for a vector you can edit in Illustrator / Inkscape; PNG for a rasterized image at ~200 DPI. All generation runs in your browser.