As I am trying to get most out of the images it does not make much sense to me to work without a visual control mechanism as every image needs different parameters to get most out of it. So, no, at the moment there is no batch tool available.
A WordPress plugin is on my todo list for a loooong time but unfortunately I can't say when it will see the light of day.
A devoted Compress-or-Die user ("mad scientist") sent a welcome surprise of an unsolicited donation of $100.00 and mentioned how important the tool is to her business. She said she wanted to show her appreciation in a tangible way. I'm overwhelmed. With this donation [1/2]
In what environment do you use Compress-Or-Die most often?