11/11/2022 0 Comments Best png compressor review![]() ![]() Same goes for the colour palette – these images can be saved in an 8-bit colour palette, that is 256 different colours. ![]() BEST PNG COMPRESSOR REVIEW PLUSThey could be uploaded in 250×250 format, then defined so that visitor’s browser shows them as 25×25 (so they don’t take half of the right hand side vertical navigation bar), but that would cause them to be about 100 times larger in (download) size, plus put load on the visitor’s browser to show them in the (“instructed”) 25×25 size. Using an example of log-in/log-out icons for a website: they are shown in a certain size, say 25×25 pixel size. This way page download time is increased and the visitor’s computer is put under more load to re-format the image before it is shown (can be a problem with slow computers – especially if there are too many big images). No, visitors will have to download the whole, large image, then their browser will (if the page is formatted that way) show it in a reduced size. That is, you can’t upload a big image, link to it, then expect the server to make it smaller and show it as such to visitors. Images are types of files that a server can’t compress “on the fly”. This is better explained in the next chapter, about the importance of optimization. Hence, image optimization is nothing more than making images just the right size for the application, with choosing an optimal compression method. That is to not save an image in a format larger than is needed. For now it just suffices to realize why image size is important. There will be more on that in the image optimization chapter. Of course, there are image saving formats that perform a very good compression, reducing the file size. True colour image, with over million colours – you get the idea. If the image is not just using black and white colour, but many shades of gray, it is roughly 256 x 10,000 pixel “information” that need to be saved. If it is a black and white picture, there is a need to save only two possible colour values for each pixel (2 x 10,000). Without going into details about bits, bytes and compression: a small image with 100×100 pixels has a total number of 10,000 pixels. The colour “depth” – how many colours and shades of each colour does an image show.Resolution – which is the number of pixels horizontally and vertically, usually expressed in a “A x B” format (1024×768, 60×80, 25×25 etc.). ![]() If they are too big, they will make page download slower and (depending on the way they are displayed) can also make the rest of the page harder to read. Make images too small, or compress them too much (later on that), it will be hard to see whatever it is that needs to be seen in the images/pictures. It’s best when it is “just right”, that is optimal size. If they are too big, it will be harder to move/run. If they are too small, they will be very uncomfortable. WordPress-related image optimization quirks BEST PNG COMPRESSOR REVIEW HOW TOHow to technically perform image optimization Which compression (image format) to use and when?ģ.4. Types of image compression – image saving formatsģ.2. First it will be explained what “website image optimization” is, why it is important, followed by explanation of how to do it (technically). BEST PNG COMPRESSOR REVIEW SERIESIn a series of posts explaining website optimization, this one deals with website image optimization. ![]()
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