Hi everyone, i was having problem with the "Optimize Images" point from the performance test from GTMetrix, i downloaded the optimized versions from there and replaced all the unoptimized images, but GTMetrix keep showing me the same without results, also other performances test recommended me the same point, what i should do? Thanks!
the optimization algorithm is very good there and it's free.
You can also use https://www.irfanview.com/ software for optimizing multiple images at once (all images in a folder) - works well if you need to optimize hundreds of product images.
For some clients, we tested a few linux programs which can optimize all the images right on the server in a specified folder but the quality is not as good as the above software so it's worth a bit of extra time required to download, optimize and upload images back to the server.
Website speed analyzers are good for telling you where the issues are and basic tips on how to fix them. But I would recommend you to get an extension for image optimization.
Most commonly the reason for the website to load longer are images, especially if they are in old JPG and PNG formats. Now, everyone tries to use WebP instead. It is also a file format which is considerably smaller in size and correspondingly takes less time to load.