Drop in any number of images and compress them with three strength levels: mild, medium, or harsh. The tool uses the browser-image-compression library to reduce file size while preserving resolution — your images keep their original dimensions. See the original and compressed file size side by side with the percentage saved. Download each image individually or grab everything as a single ZIP file. SVG files are automatically skipped since they're already optimized. Supports JPG, PNG, WebP, and most other browser-supported image formats. Pagination keeps the interface clean even with dozens of files.
TonniTools is built to run locally in your browser. Since no data ever leaves your device, everything works, even without internet.