21Relay
Bitcoin Utilities

21Relay utility

Address and Transaction Decoder

Paste a public Bitcoin address or transaction ID to explain its type, public activity, status, fee and structure.

Detail level

Guided mode keeps the decision focused. Advanced mode reveals extra assumptions.

Privacy notice: The public address or transaction ID is sent to 21Relay and mempool.space. A third-party lookup can reveal interest in that public data.

Keep in mind: Addresses and transaction IDs are public, but searching them through a third-party service can reveal interest in that data to the service and network observers.

Public data

Public lookup only. For stronger privacy, query your own Bitcoin node and block explorer.

Decoded result

Enter public Bitcoin data to see a plain-language explanation.

Methodology, data and limits
  • Addresses and transaction IDs are public, but searching them through a third-party service can reveal interest in that data to the service and network observers.
  • Address balances do not prove identity or ownership. Change-output identification is probabilistic and is deliberately not asserted here.
  • Never paste a seed phrase, private key, extended private key, descriptor or wallet backup.

Related utilities

Stuck Transaction Adviser

Review a public transaction's fee rate, RBF signal and possible CPFP path.

Open tool

Fee Estimator

Estimate on-chain transaction fees from current fee-rate recommendations.

Open tool

UTXO Health Check

Review manually entered UTXO values for high-fee exposure and privacy trade-offs.

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21Relay utilities are educational planning tools, not financial, tax or investment advice. Verify important decisions independently.

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