PicCollages is a free online pic collage maker that allows users to create stunning pic collages with 20+ templates, including grids and long images. It offers a drag-and-drop interface, local processing, and various features such as filters, effects, and text stickers. The tool provides smart layout algorithms, automatic image arrangement, and support for vertical and horizontal multi-image stitching. Users can also edit pic collages freely, adding text, adjusting positions and sizes, and applying backgrounds and filter effects.