Some creative tools, such as Photoshop, will afford some compression, but often not enough, especially with larger image types such as PNG. Reducing the weight of an image is partly about saving the image at the appropriate size and resolution (number of pixels) and partly about compressing the image. According to httpArchive, the average JPG is 29KB and the average PNG is 16KB. But a good guideline is to benchmark against the 100 most popular sites. There is no set-in-stone rule for how small a mobile image should be – it’s a trade-off between quality and page size. This is a common problem with responsive one-column designs: because images are supposed to fill up the whole container width, we often end up with huge images that carry little information compared to their size.” Most of the time huge images are not a good idea - their information density is low, and they require people to wait for the page to load and/or to scroll down for more content.
#Html optimizer for screen resolution download#
We recommend that you start with a modest size image and allow people to zoom in (or download a larger picture of the image). “Because the screen is small on mobile, too small images may offer too little information, and too big images may slow down the page too much. Raluca Budiu, Director of Research at Nielsen Norman Group, explains: Image optimization is always going to be a careful balancing act between user experience, attractiveness and page performance. The problem with image optimization is that there are no hard and fast rules.
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