Smart Previewer by Adzymic is a Chrome extension designed for users to preview display ads in a live environment by seamlessly replacing existing ad slots with creative tags. This tool eliminates the need for manual screenshots and photo editing to visualize how ads appear on real publisher websites. With Smart Previewer, users can effortlessly select elements and ad containers on live websites, specify ad dimensions, replace ads with creative tags, take screenshots, and download them as PNG files.

The extension simplifies the process by allowing users to select ad containers or specific elements on web pages, replace them with desired ad tags, and view the changes instantly. Users can also opt to display an "Ad Choice" icon, paste any creative tag, apply the changes, and download the rendered page as a screenshot for further analysis.