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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.

• What is an online clipboard?

  The definition, and the three tools it keeps being confused with — a clipboard manager, a pastebin and a file dropper are each solving a different problem.

  Also: what makes a clipboard live · syncing across different networks · without a login · Snapdrop alternatives

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 If something here is wrong or out of date, open an issue.