Web image optimization combines resizing, compression, and format conversion to achieve the smallest possible file size without visible quality loss. Properly optimized images load faster, improve SEO rankings, and provide a better user experience.
The optimization workflow is: first resize to the actual display dimensions (or 2x for retina), then compress with appropriate quality settings, and finally convert to the most efficient format (WebP for modern browsers, JPEG as fallback).
With ImgTools, you can perform all three steps in one session. Upload your image, resize to the target dimensions, then convert to your preferred output format with quality adjustment. Everything happens in your browser.
Target file sizes for web: hero images under 200KB, content images under 100KB, thumbnails under 30KB. Use WebP format for 25-35% additional savings over JPEG.
For best performance, also implement lazy loading, responsive images with srcset, and CDN delivery on your website.
ImgTools processes everything locally. Your images are never uploaded to any server.