btc mixer is a service that allows users to mix up their bitcoins by giving them out to other people who will return them back. This can help maintain anonymity when making online purchases or donations. It can also be useful if someone has been caught engaging in illegal activity and wants to erase their tracks.

There are a number of different btc mixer services available. Some are centralized and run by a company while others are decentralized and run by a community. The most important factor when choosing a mixer is the level of anonymity you want. Some mixers offer only a moderate degree of anonymity while others are much more effective.

A btc mixer can protect you from a variety of attacks, including cluster analysis and quantitative analysis, which can link your transactions to other people. These services use mathematical algorithms to split and tumble your coins, which makes it impossible for anyone to follow your transaction path. They can also delay the transfer to obfuscate it further.

Coinomize is a popular mixer that uses the bitcoin blockchain to mask your wallet address. It supports both BTC and XMR, and has a low transaction fee of only 0.0002 BTC for each extra address. Users can also choose the ‘exact amount’ mode, which guarantees that they will receive only the original sum of their deposit. The service is free to join and doesn’t require registration, but it does have a referral program.