PNG ⇄ JPG ⇄ WebP

Converts images between PNG, JPG and WebP. JPG and WebP have a quality slider (1–100); PNG is always lossless. For JPG and WebP you also choose how to handle transparency (white background, custom color, keep alpha — WebP only). Drop several files at once for batch mode: everything is converted and zipped. Runs in the browser via the native canvas encoder; no upload.