Bitcoin mixers, and cryptocurrency mixers in general, are not illegal. However, these solutions are occasionally associated with money laundering and other illegal activities. This has led to the closure of the Financial Crime Control Network (FinCEN) of the United States Treasury and other agencies. Cryptocurrency mixers are not inherently illegal, although they are used for illegal activities.
According to a July report from Chainalysis, cryptocurrency mixers are a “reference tool” for cybercriminals who trade cryptocurrencies, and illicit addresses account for nearly a quarter of the funds sent to mixers since January. However, Chainalysis noted in its report that it is “not aware that any bitcoin or Ethereum mixer is currently following these rules.” You can use a centralized mixer, which are third-party services that receive bitcoins, extract other bitcoins from other deposits and return an equivalent amount of bitcoins at the end of the transaction.