A paper cutter, also known as a guillotine trimmer, is an essential office and school tool used for cutting large stacks of paper quickly and accurately. It features a flat cutting base marked with measurement grids for alignment, and a sharp blade attached to a lever arm or rotary mechanism that slices through paper with precision. Paper cutters come in various sizes and designs, from compact desktop models for light tasks to heavy-duty versions used in print shops and professional settings.