I recommend you Caesium (lossless image compressor): Caesium - Image Compressor
The default settings are good! You may still tweak it for best results.
In this topic you can find other alternatives: Best Image Optimization Tools - #10 by Hamzster
I recommend you Caesium (lossless image compressor): Caesium - Image Compressor
The default settings are good! You may still tweak it for best results.
In this topic you can find other alternatives: Best Image Optimization Tools - #10 by Hamzster