CLS Image Scanner - Sitemap & Layout Shift Tool is a Chrome extension designed to enhance web performance by addressing Cumulative Layout Shift (CLS) issues caused by images. Targeted toward technical SEO specialists, web developers, and agencies, this tool identifies missing width and height attributes, oversized assets, and other image-related risks that can impact user experience and search engine rankings. It offers both single-page and bulk sitemap scanning capabilities, allowing users to efficiently audit and prioritize fixes for layout shifts across multiple pages.

The extension simplifies the auditing process with clear, exportable reports that facilitate communication among teams. Users can analyze individual image assets, inspect rendering behavior, and review metadata patterns in a structured format. With its focused approach to image sizing behavior and built-in export options, including CSV, JSON, HTML, and PDF, CLS Image Scanner helps streamline workflows and improve Core Web Vitals metrics, ultimately leading to a more stable and user-friendly web experience.