Crypto mixers, also known as cryptocurrency tumblers, are services that aim to enhance transaction privacy by obscuring the trail of cryptocurrency funds. They work by pooling together coins from multiple users and then redistributing equivalent amounts—minus a fee—to new addresses. This process makes it much harder to trace the origin of the funds on public blockchains. While crypto mixers can be used for legitimate privacy reasons, they have also been criticized and regulated in some jurisdictions due to their potential misuse for money laundering or other illegal activities.