Texture Prep

Batch-prepare game textures in the browser: trim transparent padding by alpha, extrude/bleed edge pixels to hide linear-filter seams, premultiply alpha, then pad to a multiple of 4 or the next power of two. Content is never scaled — only cropped or padded. Supports PNG and GIF frames; export a ZIP or send to the asset tray for atlas packing / format convert. Runs locally in a Worker with no uploads.