NOT from the one that was supposedly sent to you.
I.e. you are lying.
“No... it is saving the file in a different format. Because jpegs are lossy file formats, they are certainly a whole lot smaller. But that’s not what optimization actually means”
Optimising images for the web is a tricky business. You have to get the right balance between filesize and picture quality. It is an essential step though. Look at any webpage, and you will see that most of its load time comes from images. Your website will be needlessly slow if you don’t drop the sizes of these images.
There are three key areas where bytes can be shaved off your graphics: bit depth (number of colours), resolution, and dimension. Here I’m going to show you the practicalities of web graphics optimisation, and less of the technicalities. You don’t need expensive graphics editors to compress the sizes of your images, as there are plenty of free utilities and shareware that will do the job for you.
Which format:
•JPEGs should be used for photographs and blurry background tiles where little of the intended look will be lost by the JPEG’s compression. If a graphic needs to be accurate or sharp, stay well away from JPEGs. Just remember, most people would rather have a slightly bigger download than a messy graphic, so try not to sacrifice too much quality. Sometimes a nice effect can be had from compressing an image as a JPEG — mess around and see what you can get. Again, for big images use the progressive option when saving for the apparent speed-boost it causes.
Any questions?