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Getting the clipboard to move between two machines is more fiddly than it should be, and most of the reasons are not obvious. These pages fix the built-in features first, and say plainly where there is no fix.

• Installing RealtimeClipboard on any device

  Windows, macOS, Linux, Android, iPhone and the command line — what to install on each, and which of them can watch the clipboard in the background. Two of them cannot, and the reason is not this app.

  Per platform: Windows · macOS · Linux · Android · iPhone · command line · your own relay

• Clipboard sync not working?

  Why “Sync across your devices” is greyed out on Windows 11 — the cause almost every guide skips — plus fixes for Samsung, Android, Mac and iPhone, and what your employer can block.

More guides are on the way. If something here is wrong or out of date, open an issue.