Clipboard Sync, Done Right

ClipSync

Copy text, images, rich HTML, or files on one device — paste on another. Instantly, securely, over your local network. No cloud. No accounts. Full fidelity.

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Live Sync Active
AES-256-GCM
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This Device
Windows · macOS · Linux
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Peer Device
Connected & Encrypted
Recent Activity
✉
Meeting notes: Q3 roadmap & milestones...
Text · from This Device
just now
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design_mockup_v3.png (2.1 MB)
Image · from Peer Device
2s ago
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Cross-platform
Windows · macOS · Linux
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Dual-layer Encryption
TLS 1.3 + AES-256-GCM
⚡
Zero Configuration
Auto-discovery via mDNS
Features

Everything You Need

Clipboard sync that's fast, secure, and requires zero configuration.

⚡

Instant Sync

Sub-second clipboard sync across your LAN. Smart debouncing prevents echo and duplicate pastes.

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Dual-layer Encryption

TLS 1.3 secures transport. AES-256-GCM encrypts every frame. Different keys per peer-pair.

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Zero Configuration

mDNS auto-discovers peers on your LAN. No IP addresses, no setup — just run and it works.

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All Formats Supported

Plain text, rich HTML and RTF, spreadsheets, PNG images — preserved with full fidelity.

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File Transfer

Send files between paired devices over the same encrypted channel. No size limits.

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Privacy by Design

Everything stays on your LAN. Nothing touches the cloud. Clipboard history encrypted at rest.

Web Companion

Mobile Access, No App Needed

Scan a QR code and access your clipboard from any phone on the same network. No install, no account.

📱

No App Needed

Open your phone browser, scan the QR code, done. Works on iOS and Android right away.

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View & Copy

See recent clipboard history from all your devices. Tap any item to copy it to your phone.

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Push & Transfer

Type text on your phone and push it to any connected device. Upload and download files too.

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PWA Ready

Add to Home Screen on iOS/Android for a native app feel. Works offline after first visit.

Use Cases

Sync Everywhere, Seamlessly

Whether you're coding, designing, or just getting work done — ClipSync fits right in.

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Multi-Device Workflow

Copy text on your desktop while writing docs. Pick up your laptop and paste instantly — no email or messaging middleman.

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Development & Debugging

Copy error logs on Windows, paste into your MacBook terminal. Code snippets, API responses — sync in under a second.

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Creative Flow

Copy a color palette on your desktop, paste it into a design file on your laptop. Ideas move as fast as you do.

Why ClipSync

Not All Clipboard Tools Are Equal

Most clipboard sync tools are cloud-dependent or plain-text only. ClipSync is different.

ClipSync
Cloud Tools
Rich Text / HTML (links, tables, formatting)
✓ Full fidelity
✗ Plain text only
Images (PNG, any resolution)
✓ Full resolution
✗ Not supported
File Transfer
✓ Encrypted channel
✗ Not supported
Data Privacy
✓ Pure LAN, never leaves
✗ Goes through cloud
Account Required
✓ None — just run it
✗ Account + sign-in
Cross-Platform
✓ Win / Mac / Linux
~ Varies by tool
Encryption
✓ TLS 1.3 + AES-256-GCM
~ TLS only (if at all)
Price
✓ Free & Open Source
✗ Freemium / Paid
Security

Defense in Depth

Multiple layers of encryption protect your data — in transit and at rest.

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Application

AES-256-GCM per frame

  • Keys derived via HKDF from Ed25519 certificates
  • Optional pre-shared password for extra entropy (PBKDF2, 600K iterations)
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Transport

TLS 1.3 + Ed25519

  • Self-signed X.509 certificates with Ed25519 keys
  • Certificate pinning — trust-on-first-use with change detection
➔
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At-Rest

AES-256-GCM on disk

  • Encrypted config + clipboard history storage
  • Password stored as PBKDF2 verification token (never persisted)
How It Works

Four Simple Steps

From discovery to sync in under a second.

1

Discover

Devices find each other automatically on the LAN via mDNS/Zeroconf.

2

Pair

Confirm the 8-digit pairing code on both sides. Certificates are pinned for trust.

3

Sync

Clipboard change detected → hash dedup → encrypt → send → write.

4

Trust

Paired devices auto-reconnect. Cert changes are flagged immediately.

Supported Formats

Full Fidelity Sync

FormatTypeNotes
Plain TextTEXTUTF-8, full Unicode support
HTMLHTMLPreserves links, tables, formatting, embedded images
Rich TextRTFMicrosoft Office / WordPad compatible
PNG ImagesIMAGE_PNGAny resolution, compressed
Files (transfer)FILEAny file type, encrypted channel, no size limit
FAQ

Still have questions?

No. All data transfers happen directly over your local network, peer-to-peer, protected by TLS 1.3. ClipSync has no server component — your clipboard data never leaves your LAN.
Yes. ClipSync runs on Windows, macOS, and Linux. You can copy on Windows and paste on a MacBook seamlessly — the platform doesn't matter.
No accounts, no sign-ups, no registration. Download, run, and devices discover each other automatically via mDNS. One-time pairing with an 8-digit code is all it takes.
ClipSync uses dual-layer encryption: TLS 1.3 secures the transport channel, and AES-256-GCM encrypts each data frame at the application layer. Initial pairing uses an 8-digit verification code to prevent MITM attacks, followed by certificate pinning — you'll be alerted immediately if a device's identity changes.
Yes. ClipSync is free and open-source software under the MIT license. No ads, no paywalls, no data collection. The code is on GitHub — contributions are welcome.
Download

Ready to Try?

Download for your platform. No install needed — just run and sync.

💻

Windows

Portable .exe

↓ Download
🍎

macOS

Universal .app bundle

↓ Download
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Linux

Binary tar.gz

↓ Download

Or view all releases · build from source