Bitcoin Core is the original Bitcoin client and it builds the backbone of the network. It downloads and, by default, stores the entire history of Bitcoin transactions, which requires a few hundred gigabytes of disk space. Depending on the speed of your computer and network connection, the synchronization process can take anywhere from a few hours to a day or more.

To download Bitcoin Core, visit bitcoincore.org.

The following are some helpful notes on how to run Bitcoin Core on your native platform.

Unpack the files into a directory and run:

• bin/bitcoin-qt (GUI) or
• bin/bitcoind (headless)

Unpack the files into a directory, and then run bitcoin-qt.exe.

Drag Bitcoin Core to your applications folder, and then run Bitcoin Core.

• See the documentation at the Bitcoin Wiki for help and more information.
• Ask for help on Bitcoin StackExchange.
• Ask for help on #bitcoin on Libera Chat. If you don't have an IRC client, you can use web.libera.chat.
• Ask for help on the BitcoinTalk forums, in the Technical Support board.

The following are developer notes on how to build Bitcoin Core on your native platform. They are not complete guides, but include notes on the necessary libraries, compile flags, etc.

• Dependencies
• macOS Build Notes
• Unix Build Notes
• Windows Build Notes
• FreeBSD Build Notes
• OpenBSD Build Notes
• NetBSD Build Notes
• Android Build Notes

The Bitcoin repo's root README contains relevant information on the development process and automated testing.

• Developer Notes
• Productivity Notes
• Release Notes
• Release Process
• Source Code Documentation (External Link)
• Translation Process
• Translation Strings Policy
• JSON-RPC Interface
• Unauthenticated REST Interface
• Shared Libraries
• BIPS
• Dnsseed Policy
• Benchmarking

• Discuss on the BitcoinTalk forums, in the Development & Technical Discussion board.
• Discuss project-specific development on #bitcoin-core-dev on Libera Chat. If you don't have an IRC client, you can use web.libera.chat.

• Assets Attribution
• Assumeutxo design
• bitcoin.conf Configuration File
• CJDNS Support
• Files
• Fuzz-testing
• I2P Support
• Init Scripts (systemd/upstart/openrc)
• Managing Wallets
• Multisig Tutorial
• P2P bad ports definition and list
• PSBT support
• Reduce Memory
• Reduce Traffic
• Tor Support
• Transaction Relay Policy
• ZMQ

Distributed under the MIT software license.