Google PageSpeed Insights frequently flags oversized images as the primary opportunity for performance improvement. Properly compressed images can improve your PageSpeed score by 20-40 points and dramatically reduce Largest Contentful Paint (LCP) times.
The most impactful optimizations are serving images at display dimensions (not larger), using modern formats like WebP, and applying appropriate lossy compression (75-85% quality for JPEG and WebP).
With ImgTools, resize your images to the actual display size needed, then compress with the quality slider. For hero images, target under 200KB. For content images, target under 100KB. For thumbnails, target under 30KB.
After optimization, re-run PageSpeed Insights to verify improvement. Common targets are LCP under 2.5 seconds and total image weight under 500KB per page.
All processing happens locally in your browser. Optimize your entire site's images with complete privacy.