JPG compression works by reducing image quality to achieve smaller file sizes:
- Quality 90-100%: Minimal compression, best for print or professional use.
- Quality 70-89%: Good balance between quality and file size, ideal for web.
- Quality 40-69%: Noticeable compression artifacts, but smaller files.
- Quality below 40%: Heavy compression, suitable only when file size is critical.
Note: All compression is done locally in your browser. Your images are never uploaded to any server.