Responsive Lab

Responsive Lab is a developer tool for testing responsive web design across multiple device viewports simultaneously. Key Features: • View websites in multiple device sizes side-by-side (iPhone, iPad, Android, Desktop, and custom viewports) • Take screenshots of individual viewports at exact device dimensions • Drag-and-drop to reorder viewports for easy comparison • Filter viewports by device type (Mobile, Tablet, Desktop) • Toggle between portrait and landscape orientations • Add custom viewport sizes for testing specific dimensions • Dark mode support for comfortable extended use • All processing is done locally - no data collection or transmission Perfect for web developers, designers, and QA testers who need to verify responsive layouts and cross-device compatibility quickly and efficiently.