Trimage Image Compressor and Yahoo! Smush.it are free tools for optimizing images losslessly. Both work similar but may not give you the same result. I have done some testings and here I will review and show you what I’ve found from the tests.
|Requirement||Linux operating system||Need to go online|
|Image file types||JPEG, PNG||JPEG, GIF, PNG|
|File size limitation||none||Maximum 1 MB|
|Exposing privacy||none||Risking privacy to be exposed|
|Optimized file size||Can be larger than Smush.it’s result||Can be smaller than Trimage’s result|
We cannot simply say which one is better, each of them has their own advantages. Smush.it can give you smaller files, but you’re only allowed to use it on files up to 1 MB in size. For privacy reason, you should not upload your private images to them. While on Trimage, you don’t need to connect to the Internet, but you may not get the smallest results and your computer needs Linux operating system to run it.