bitcoinj is a Java implementation of the Bitcoin protocol, which allows it to maintain a wallet and send/receive transactions without needing a local copy of Bitcoin Core.

Commercial Use
Modify
Distribute
Place Warranty
Sub-License
Private Use
Use Patent Claims
Hold Liable
Use Trademarks
Include Copyright
State Changes
Include License
Include Notice
These details are provided for information only. No information here is legal advice and should not be used as such.
30 Day SummarySep 13 2026 — Oct 13 2026
|
12 Month SummaryOct 13 2025 — Oct 13 2026
|