ImageSwap is a free Chrome extension designed for web developers and designers, allowing users to replace all webpage images with high-quality, randomly-generated Picsum photos. This tool is especially useful for testing layouts, debugging designs, and visualizing page structures while maintaining original image dimensions. With dual replacement modes, users can opt to replace all images or only broken ones, providing flexibility during the development process.

Key features include intelligent image replacement, persistent settings synchronized across browser sessions, and robust privacy measures ensuring no data collection. ImageSwap also supports dynamic content through MutationObserver technology, making it compatible with lazy-loaded images and single-page applications. Custom CSS injection and URL pattern filtering allow for enhanced control, making this extension an essential tool for anyone needing placeholder images during development.