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ShareClick lets you move a single keyboard & mouse — plus the clipboard and files — between your macOS and Windows machines over the LAN, with the lowest input lag we can squeeze out. Think ShareMouse / Synergy / Deskflow, but free, open, and built for latency first. It’s a free alternative to Synergy, ShareMouse, Barrier and Input Leap, the Mac-capable answer to Mouse Without Borders, and effectively Universal Control for Windows.

Quickstart

Share your mouse & keyboard in about 60 seconds.

Download

Get the latest macOS .dmg or Windows installer.

How it works

The UDP + TCP dual-channel design behind the low latency.

Compare

ShareClick vs. Synergy, ShareMouse, Barrier & more.

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What it does

One keyboard & mouse

Push your cursor across the screen edge to control the other machine — no hotkey needed.

Shared clipboard

Copy on one machine, paste on the other. Text and images sync automatically.

Drag-and-drop files

Send files between machines over a reliable, chunked transfer channel.

End-to-end encrypted

X25519 + a shared passphrase + ChaCha20-Poly1305 on every channel. LAN-only, no cloud, no accounts.

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Why another KVM?

We surveyed everything in this space before writing a line of code and took the best of each: Lan Mouse’s UDP input path for lowest latency, Deskflow/Synergy’s portable key IDs and clipboard/file features, and ShareMouse’s “drag-and-drop just works” UX goal.
ToolLicenseMouse/KBClipboardFiles
ShareMousePaidYesYesYes
SynergyPaidYesYesYes
DeskflowGPLv2YesYesPartial
Input LeapGPLv2YesYesPartial
BarrierOpenYesYesNo
Lan MouseOpenYesNoNo
ShareClickMIT/ApacheYesYesYes
ShareClick’s transport adds only ~6 µs one-way overhead on loopback — your real input lag is dominated by LAN round-trip and OS injection, not our code. See Latency.

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Get help

Troubleshooting

Fixes for the most common setup issues.

Open an issue

Report a bug or ask a question on GitHub.