Could someone knowledgeable in website design and development please explain the technique used by Google, Microsoft, and other websites to feature high-resolution photos as backgrounds on their webpages while maintaining a small file size?
Here are some examples:
Discover these useful online tools for compressing images in different formats:
Furthermore, Google advocates for the .webp format which produces smaller files, although its compatibility with all browsers is not yet universal.
It's uncertain if we are referring to the same images since these pages are personalized and constantly changing, but this Google image is a 200KB PNG that can be reduced to 72KB using ImageAlpha / pngquant.
For JPEGs, you might want to consider JPEGMini.
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