If you are a student or hobbyist, email JPEGmini support. They regularly offer 40% discounts. They would rather sell you a $35 license than have you infect your machine with a crack.

If you do not have a license, JPEGmini offers a that allows you to optimize up to 50 images per day without requiring an account or credit card.

You should have received your activation code in a immediately after purchase.

This report explains why searching for such codes is not only unethical but also technically dangerous, and outlines legitimate alternatives for obtaining the software at a better value.