Pick the right file format for your images. Use JPEG for photos and complex images, PNG for images that need transparency, and SVG for icons or graphics that need to scale without losing quality.

Before uploading, resize your images to the dimensions they'll be displayed at on your site. This cuts down the file size a lot.

Use image compression tools like TinyPNG, JPEG-Optimizer, or ImageOptim to shrink file size without losing quality. Aim for a good balance between compression and how the image looks.

In WeWeb, use the picture tag with different sizes and resolutions of the same image. This makes sure your images look great and load well on all devices and screen sizes.

<picture>
  <source srcset="image-300w.jpg" media="(max-width: 300px)">
  <source srcset="image-800w.jpg" media="(max-width: 800px)">
  <img src="image.jpg" alt="Description of image">
</picture>

Use lazy loading to delay loading images until they're needed. This speeds up the initial load time. In WeWeb, you can do this with code snippets or built-in options if they exist.

<img src="image.jpg" loading="lazy" alt="Description">

Convert your images to WebP format. It compresses better than JPEG and PNG while keeping high quality. Use tools like Squoosh.app or Cloudinary for this.

Use a Content Delivery Network (CDN) to serve your images from servers closest to your users. This cuts down load times and bandwidth. Check WeWeb’s docs for CDN integration if they have it.

Set the right caching headers for your images. This helps browsers store and retrieve them efficiently, cutting down load times for repeat visitors. Configure cache settings via WeWeb’s settings or your host configuration.

Cache-Control: max-age=31536000, immutable

Combine multiple images into a single sprite when it makes sense. This reduces the number of HTTP requests, speeding up load times. Use tools like CSS Sprites Generator to create and use image sprites.

Example CSS for Image Sprites

.sprite {
  background: url('sprite.png') no-repeat;
  display: inline-block;
}
.icon1 { background-position: 0 0; width: 50px; height: 50px; }
.icon2 { background-position: -50px 0; width: 50px; height: 50px; }

Make sure all images have descriptive ALT text. This is good for SEO and also improves accessibility, which can indirectly boost site performance and user engagement.

<img src="image.jpg" alt="Detailed description of the image">

Following these steps will help optimize images in WeWeb effectively, resulting in a faster, more efficient website.