Chrome extension
Overlay design mocks directly on live webpages
The UI Overlay Chrome extension adds a compact page control panel for visual comparison inside the browser.
Auto-inject controls
Enable a floating page button so the overlay controls are ready when normal webpages finish loading.
Local mock images
Import mock images from your device. The extension keeps overlay state locally in Chrome storage.
Precise tuning
Adjust opacity, scale, offsets, inversion, lock mode, and click-through mode while reviewing a page.
Privacy-friendly by design
The extension does not upload mock images, webpage content, or browsing data to a remote server. It stores settings and overlay state locally.