Accessibility.
The core select–compress–download flow is designed toward WCAG 2.2 AA. It supports keyboard operation, visible focus, labelled controls, status announcements, sufficient text contrast, responsive zoom, and reduced-motion preferences.
Known limits
Image comparison is inherently visual. Essential result information—file size, dimensions, encoder, processing time, and risk—is also provided as text. Automated and keyboard tests do not replace testing with people who use assistive technology.
Feedback before launch
A public accessibility contact method and tested browser/assistive-technology matrix must be added before production deployment.