Image optimization is usually done to reduce the size of the image file and so that it can be loaded faster on the web, normally in computers with slow internet connection. So there are many tools available for desktops and macs which help in optimizing image size. But there are tools which help you do every thing online too.
Here are 3 best tools that would optimize your images and make the file size smaller than the normal one.
Dynamic Drive Image Optimizer lets you easily optimize your gifs, animated gifs, jpgs, and pngs, so they load as fast as possible on your site. Furthermore, you can easily convert from one image type to another. Upload Size limit: 300 kB
Enter the URL of the image file or upload a file of upto 300 Kb and convert into any other image format or use the same format.
Web Resizer software helps to optimize images by resizing the size of the image file of any size, and you can add colors and increase or decrease the brightness of the image, and a good a good percentage of image size is reduced from the original one.
Smush It – A free tool to optimize images, and they say : Smushit.com is a service that goes beyond the limitations of Photoshop, Fireworks & Co. It uses image format specific non-lossy image optimization tools to squeeze the last bytes out of your images – without changing their look or visual quality. You’ll get a report of how many bytes you can save by optimizing your images and all the changed images as a single zip for download.
You can either upload images or just directly provide the URL of the image whose size is to be mushed. A zip archive with optimized images will be generated to you for download.