Shrink JPG, PNG, and WebP file sizes up to 80% with zero visible quality loss. 100% private in-browser optimization with no file size limits.
Reduce image storage and accelerate page speeds in three fast steps.
Drag and drop any combination of JPG, PNG, or WebP images from your computer or mobile device.
Choose your target quality or set a strict maximum target file size (e.g. 100 KB or 200 KB).
Download the compressed images with dramatic file size reductions, either individually or in a ZIP package.
Designed for privacy, speed, and uncompromising quality.
Processing executes on your hardware threads instantly. No server uploading or download timeouts.
Zero images ever leave your browser. Perfect for private documents, contracts, and confidential assets.
Need images under 100KB for government or job applications? Simply enter your target KB size.
Compress an entire album or asset library and download all compressed files organized in one ZIP file.
Our compression engine uses perceptually tuned WebAssembly encoders (such as MozJPEG, libpng, and libwebp). It removes redundant visual data, optimizes Huffman coding tables, and eliminates metadata that the human eye cannot perceive.
Yes. In compression mode, Convert.cool optimizes your JPG, PNG, or WebP file within its original format, so you don't have to worry about compatibility issues.
No limits. Because compression runs directly on your device CPU/GPU and does not consume server bandwidth, you can compress as many images as your computer memory can handle.
Never. All image processing happens locally within your web browser sandbox. Your personal photos, receipts, or work documents never leave your device.