Convert your JPG and PNG images into the modern WebP format for significantly smaller file sizes and faster page loads. Choose between high, medium, or low quality depending on your needs. Upload as many images as you want and convert them all in one batch. The conversion uses the browser's native Canvas API, so no libraries or server-side processing is involved. See a file-by-file comparison of original and converted sizes with percentage saved. Download individual files or everything together as a ZIP. WebP is supported by all modern browsers and typically achieves 25–35% smaller files than equivalent JPG quality.
TonniTools is built to run locally in your browser. Since no data ever leaves your device, everything works, even without internet.