What problem does it solve? Images are often the largest assets on a webpage and a common source of SEO and Core Web Vitals problems: missing alt text hurts accessibility and rankings, oversized files slow page loads, and missing dimensions cause layout shifts. This Skill audits a page's images against SEO and performance best practices and produces a prioritized fix list. ## Core Features & Use Cases - Alt Text Audit: Detects missing, non-descriptive, or keyword-stuffed alt attributes on all <img> elements. - Size & Format Analysis: Flags oversized images against tiered thresholds (thumbnails, content, hero) and recommends WebP/AVIF over JPEG/PNG with <picture> fallback patterns. - Performance Checks: Verifies responsive srcset/sizes, correct lazy loading (below-fold only), fetchpriority="high" on LCP images, decoding="async", and width/height attributes for CLS prevention. - Use Case: Run an image audit on a landing page before launch to find a 2MB hero PNG, five images missing alt text, and a lazy-loaded LCP image, then get a prioritized optimization list sorted by estimated byte savings. ## Quick Start Run an image optimization audit on https://example.com and list the biggest fixes first.
