But processing JPEG images are very good. I found that resizing and lowering PNGs to 256 or less colors produced poorer quality results than some of the other tools here. You can perform edits like convert, resize, crop, change color depth, etc. XnConvert has many features like batch processing many images at once. Note: You can get the Photoshop Elements version at a low cost. And GIF animated files can be easily edited and compressed smaller than GIMP can do. Well it is not free, you can get it cheap on monthly payments. The 256 PNG conversion does not have good color dithering options, so the quality on 256 color images suffer. It also can significantly decrease a GIF animation file size. It can convert one file to another, and has good JPEG compression settings. However, quality suffers quite a bit when resizing. The GIMP image editor is more like a free version of Photoshop. It can do all three functions needed in image optimization ( convert, resize, compress). Let’s review them and see which ones you like. Some of the below tools just compress files, resize, or convert, and some do all three functions. The following is what we have installed on our computers to optimize the images on our website (we have a lot!) Image Processing Tools So now comes the need for free software that optimize your images and makes your pages load faster. This need makes sense when you read this link on how long page load times can make your visitors back-out before the images all finish loading. And if you use a lot of images per post, then it becomes even more imperative that you optimize those images, because page load time can be much slower. Here is a good link from Google that explains in detail what image format to use on your site, depending on its main purpose.Įven if your website or blog posts have one or a few images, optimizing can make the pages load faster. A good color dithering algorithm is required (see below for the best tools). However, the image quality will suffer if the original image contained 1000 or more colors. Most PNG’s you will use will probably be True Color, so downsizing it to 256 (or less) can make a big difference. In this mode the file size can almost be cut by 70%. In this mode, due to the large palette size, PNG images can slow down your blog or website. PNG (Portable Network Graphics) PNG images come in two flavors:.GIF is also best used for simple animations. This makes the file suitable for simple drawings or images that do not require a detailed color spectrum. GIF (Graphics Interchange Format) GIF images provide a simpler palette. If lower than 60% compression, the image quality can suffer, but it depends. JPEG files can be highly compressed, usually at 60% to 90%. This makes it suitable for portraits, product images, and photographs.
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