Watermarkly offers a free and user-friendly online PNG to JPG converter that allows users to effortlessly change image formats without the need for complex software. The tool supports batch processing, enabling users to convert multiple files simultaneously, and offers options to adjust image quality and size. Users can choose between standard and maximum quality settings, as well as compress images to reduce file size. The platform is mobile-friendly and does not require any personal information for access, making it a convenient choice for quick image conversions.