Bitcoin privacy checkup

Every amount, every address and every transaction, for good. Addresses carry no names, but a few habits tie them together: spending coins from several addresses at once, paying round amounts, reusing an address, or moving coins to or from an exchange that knows who you are. Chain-analysis firms apply exactly these patterns at scale; this checkup applies them to your own history.

No. The checkup looks for six common patterns in the transactions it reads, and finds exchanges only where their addresses carry a label in Wardcrest’s address intelligence. Someone with more data, such as an exchange’s customer records or the IP address you broadcast from, can link far more. Treat the report as a list of leaks to stop, not as a grade.

How strong an observer’s guess is. Change is likely when two clues agree, such as the only output of the inputs’ address type next to a round payment, or when the output was later spent with the payer’s other coins; one weaker clue makes it possible. Round dollar amounts use that day’s closing price, so they are only ever possible. Findings marked “on the chain” are facts anyone can read, such as an address that was paid twice.

A pasted address, or the addresses your browser derives from your xpub; the key itself never leaves your device. Our server asks mempool.space or Blockstream for their transactions, keeps the answers in memory for five minutes, and never stores or logs the addresses. Exchange labels and daily prices come from our own database.

The newest 25 confirmed transactions of each address, plus any unconfirmed ones. For an xpub it scans the receiving and change addresses until 20 unused ones in a row, the gap limit wallets use, and stops at 60 addresses on each or after 500 transactions. The report says when a limit cut the scan short.

Not for privacy. Consolidating spends many coins in one transaction, which links all their addresses permanently. Merge only coins that are already linked, such as change from the same payments, and keep coins from an exchange apart from coins you got elsewhere. The UTXO consolidation planner shows what a merge costs and which coins it takes.