Gridder

Gridder is a customizable image grid overlay tool — designed for artists and illustrators who sketch from photo references or plan paintings.
Import any image, crop it to your desired format, and apply a customizable grid. You can adjust the number of rows and columns, grid line thickness, opacity, and color to suit your style. When you're ready, export the final image with the grid applied for printing, sketching, or saving to your reference library.