webp.wiki is a free, browser-first tool to batch convert and compress images to WebP — no uploads, no installs, no account. Drag and drop dozens of JPEG, PNG, GIF, AVIF, BMP or TIFF files at once, tune the quality and compression sliders, then export everything as a ZIP. Images never leave your device: decoding and encoding run locally in your browser, so sensitive client assets stay private. It also converts WebP back to JPG, PNG or GIF. 100% free forever, no watermarks, no file-count caps.