HTML Image Generator

Use lazy loading (loading='lazy') for images below the fold or not immediately visible on page load. This improves initial page performance by deferring image downloads until needed. Use eager loading (loading='eager') only for critical above-the-fold images like hero banners that should load immediately. The default behavior (no loading attribute) is typically equivalent to eager.

<img> is a simple image tag for basic images. <picture> provides responsive image support with multiple sources for different screen sizes or formats (art direction). <figure> is a semantic HTML5 element that groups an image with its caption (figcaption), providing better structure for images with descriptions. Use <img> for most cases, <picture> for complex responsive needs, and <figure> when you need captions.

Srcset defines available image sources with their widths (e.g., 'image-400w.jpg 400w, image-800w.jpg 800w'). Sizes tells the browser how wide the image will be displayed at different viewport sizes (e.g., '(max-width: 600px) 400px, 800px'). The browser uses both to select the most appropriate image source for the current device and viewport, optimizing performance by avoiding unnecessarily large downloads.

Setting width and height attributes prevents Cumulative Layout Shift (CLS) - a Core Web Vital metric. When dimensions are specified, the browser reserves the correct amount of space before the image loads, preventing content from jumping around as images load. This improves user experience and SEO. The browser still respects CSS, so images remain responsive with max-width: 100%.

Fetchpriority is a modern attribute that hints to the browser which resources to prioritize. Set fetchpriority='high' for critical above-the-fold images (like hero banners) to load them before other resources. Use 'low' for below-fold images that can wait. Most images should use the default (auto) and rely on lazy loading instead. This attribute provides fine-grained control over resource loading priority.

Yes, when you provide proper alt text! The generated code follows accessibility best practices: all img tags include alt attributes, figure elements use semantic HTML5 structure, and you can add descriptive alt text and optional title tooltips. However, accessibility depends on YOU providing meaningful alt text that describes the image content for screen reader users. Don't leave alt text empty unless the image is purely decorative.