Secure peer-to-peer clipboard sharing and file transfer across devices on your local network.
Klip runs in the system tray and automatically syncs your clipboard between all connected devices. Copy on one machine, paste on another. It also supports sending files directly to a connected peer.
- Clipboard sync — copy text on one device, paste on any other connected device
- File transfer — send files to peers via the system tray menu
- Zero configuration — devices discover each other automatically using mDNS
- End-to-end encryption — all traffic is encrypted with TLS 1.3 using auto-generated certificates
- Cross-platform — works on macOS, Linux, and Windows
- On startup, Klip generates a self-signed TLS certificate and advertises itself on the local network via mDNS
- When another Klip instance is discovered, devices establish a mutual TLS connection and exchange a handshake
- Clipboard changes are detected and broadcast to all connected peers in real time
- File transfers use a separate data channel with offer/accept protocol and progress tracking
The free version supports up to 2 devices. Klip Pro removes this limit.
Requires Homebrew. Install and run:
brew install PatrykDz95/tap/klip
klipHomebrew builds Klip from source on your machine, so on macOS the binary is not quarantined and Gatekeeper never blocks it — no "Open Anyway" step needed.
Recent Homebrew versions require you to trust third-party taps. If the install is refused with a tap-trust message, run:
brew trust --formula PatrykDz95/tap/klipthen re-run the install.
To update later:
brew update && brew upgrade klipIf you don't have Scoop yet, install it first (PowerShell, no admin needed):
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
irm get.scoop.sh | iexThen install and run Klip:
scoop install https://raw.githubusercontent.com/PatrykDz95/Klip/master/packaging/scoop/klip.json
klipWindows SmartScreen may warn on first run because the app is unsigned — click More info → Run anyway (see the antivirus note below).
Download the latest release from the Releases page.
On macOS, unzip klip-darwin-arm64.zip and move Klip.app to your Applications folder (see the first-launch note below).
Klip is not malware — it is open-source and unsigned (it has no paid Apple Developer certificate). Because of that, macOS Gatekeeper blocks it on first launch with a message like "Apple could not verify Klip is free of malware". You only need to allow it once.
Option 1 — via System Settings (recommended, works on macOS Sequoia):
- Double-click Klip.app — the blocked dialog appears; click Done.
- Open System Settings → Privacy & Security, scroll down to the "Klip was blocked…" notice and click Open Anyway.
- Confirm with Touch ID / password, then click Open in the final dialog.
After this, Klip launches normally every time.
Option 2 — via Terminal (one command):
xattr -dr com.apple.quarantine /Applications/Klip.appThen open Klip.app as usual.
Klip is unsigned, so your antivirus may flag it as suspicious. This is a false positive — the app is open source and you can review or build it yourself:
git clone https://github.com/PatrykDz95/Klip
cd Klip
go build -ldflags "-s -w" -o klip.exe ./cmd/klipKlip appears in your system tray. From there you can:
- See connected devices
- Send a file — click the device name in the tray menu and select a file
- Pause/resume clipboard syncing
- Unit/integration tests:
go test ./... -count=1 -timeout=2m - Race detector:
go test -race ./... -count=1 -timeout=5m - Coverage report file (local):
go test ./... -covermode=atomic -coverprofile=coverage.out
- All connections use TLS 1.3
- Peer identity uses TOFU + certificate fingerprint pinning
- First contact auto-trusts a device; future certificate changes require user confirmation
- Certificates are ECDSA P-256, auto-generated and stored in
~/.klip-sync/certs/ - Trusted peer fingerprints are stored in
~/.klip-sync/trusted_peers.json - Clipboard data is never sent unencrypted
- File transfers require explicit acceptance from the receiving device