PHLEARN – How to Use the Slice Tool in Photoshop

The Slice tool cuts a single image into smaller sections that can be exported and compressed separately. It was designed for the era when websites were built from tables of small images and every kilobyte mattered on a dial-up connection. Modern connections load full-size images without trouble, so this is largely a legacy tool – but it is still the fastest way to carve one file into several pieces, and knowing what those slice lines mean will save you confusion if you open an old layered file.