Real-Time Cross-Device Clipboard

Cross Device Clipboard Sync —
Copy on Phone, Paste on PC

Q: How does cross-device clipboard sync work in Textunnel?

Textunnel establishes a direct WebRTC peer-to-peer data channel between your devices. Once connected in the same room, text copied on one device transmits securely in real-time memory buffers and updates your recipient device clipboard without touching external servers.

Q: Is my copied text, password, or token stored on central servers?

No. Clipboard synchronization is completely decentralized. Text travels point-to-point via DTLS 1.3 encrypted WebRTC streams directly over your local network. Once the session tab is closed, memory buffers are immediately purged.

Q: Do I need to install apps on macOS, Windows, iOS, or Android?

No software installation is required. Textunnel operates 100% inside modern web browsers (Chrome, Safari, Edge, Firefox, Brave) across desktop and mobile devices.

Q: Can I copy on Mac and paste on Windows or Android?

Yes! Unlike Apple Universal Clipboard which is strictly locked to Apple hardware, Textunnel bridges macOS, Windows 11, iOS, Android, and Linux seamlessly.

Q: Is there any character limit for clipboard text or code snippets?

No artificial limits exist. You can copy long source code files, multi-megabyte JSON payloads, SQL dumps, or full articles with instant zero-truncation delivery.

Q: How does Textunnel compare to sending messages to myself on Slack or WhatsApp?

Messaging apps permanently upload your sensitive clipboard data, passwords, and 2FA codes to corporate cloud databases where they remain in chat history. Textunnel operates via ephemeral point-to-point memory with zero cloud retention and zero account logins.

Q: Does cross-device clipboard work if devices are on different networks?

Yes. When devices are on the same Wi-Fi or LAN, Textunnel transfers data over your high-speed local network. If devices are on separate networks (e.g. mobile 5G to office Wi-Fi), WebRTC securely routes encrypted traffic via NAT traversal.

Q: Can I also copy images and files through this clipboard tool?

Yes. In addition to text, URLs, and code blocks, you can drag and drop images, screenshots, and multi-gigabyte files directly into the transfer window for instant streaming.

Q: Do keyboard shortcuts (Command+C vs Ctrl+V) work seamlessly?

Yes. Simply press Command+C on macOS or Ctrl+C on Windows/Linux. Pasting into Textunnel automatically broadcasts the text, and clicking the one-click copy button on the target machine places it directly onto that OS clipboard.

Q: Is clipboard history saved in the browser?

Textunnel displays an ephemeral session history in your active browser tab for convenience. As soon as you refresh or close the tab, all history is wiped clean.

Sync your clipboard online instantly. Copy text, links, or code on one screen and paste them directly on another with zero cloud storage and zero software installations.

Real-Time Sync

Instant text relay under 30ms latency

Universal Web

Works on Mac, Windows, iOS, and Android

Large Payloads

Copy complex JSON, tokens, and multi-MB code

E2E Encrypted

100% private DTLS 1.3, zero server logs

Direct Device-to-Device

0 Server Storage

100% P2P Encrypted

Drop Files for Instant P2P Transfer

Drag & drop any files or folders here, or click to browse. No file size limit.

End-to-End Encrypted· Zero Cloud Uploads· Unlimited Size

Decentralized Clipboard

The Cleanest Cross Device Clipboard Solution

Traditionally, sharing text between devices meant emailing yourself, creating draft messages in chat apps like WhatsApp or Slack, or relying on third-party cloud note tools. These methods leave your sensitive passwords, two-factor authentication tokens, and proprietary code stored on remote databases indefinitely.

Textunnel establishes a direct WebRTC data stream. Copy on your phone screen, and the text syncs to your desktop browser memory immediately with zero server retention and zero cloud persistence.

Zero Database Storage · Ephemeral In-Memory Tunnel

Quick Start

How to Sync in 3 Steps

Open Textunnel on Both Screens

Open textunnel.com on your phone and computer, or scan the QR code from your phone camera.

Copy Text, Links, or Code

Copy on your phone or PC and paste into the Textunnel transfer interface.

One-Click Local Copy

The text appears in real time. Click copy or drag to destination with zero latency.

Zero Installs · Works in Chrome, Safari, Edge & Firefox

Comparison Matrix

Cross-Device Clipboard Methods Compared

Evaluate security, cross-platform compatibility, and privacy across popular text-sharing workflows.

Method / Tool	Cross-Platform	App Install Required	Cloud Privacy Risk	Latency	Character Limits
Textunnel Clipboard	Universal (All OS)	None (Browser Web)	Zero (Pure P2P)	< 30 ms	Unlimited
Apple Universal Clipboard	Apple Only (iOS/Mac)	Pre-installed	Low (Apple iCloud)	~ 500 ms	~ 2 min expiry
Pushbullet / Join	Windows & Android	Requires Extension & App	High (Cloud Database)	~ 1 - 2 sec	Limited on Free Tier
KDE Connect	Linux, Windows, Android	Requires Software Setup	Low (Local LAN)	< 50 ms	Unlimited
Self-Messaging (Slack / WhatsApp)	Universal	Requires Account & Login	Extreme (Stored Forever)	~ 1 - 3 sec	4,000 char cap

Zero-Knowledge DTLS 1.3

Every peer-to-peer data channel encrypts payload packets using Datagram Transport Layer Security (DTLS) with AES-GCM ciphers. Third parties and ISPs see only opaque ciphertext.

Pure In-Memory Ephemeral

Text content lives exclusively in volatile browser RAM. Nothing is written to IndexedDB, LocalStorage, or disk caches. Closing the browser tab eradicates every byte permanently.

Direct Local Network Speed

When devices share the same Wi-Fi router, packets travel point-to-point over your local area network without consuming mobile broadband quota or external cloud bandwidth.

Frequently Asked Questions

Everything you need to know about cross-device clipboard synchronization.

Q1.How does cross-device clipboard sync work in Textunnel?

Textunnel establishes a direct WebRTC peer-to-peer data channel between your devices. Once connected in the same room, text copied on one device transmits securely in real-time memory buffers and updates your recipient device clipboard without touching external servers.

Q2.Is my copied text, password, or token stored on central servers?

No. Clipboard synchronization is completely decentralized. Text travels point-to-point via DTLS 1.3 encrypted WebRTC streams directly over your local network. Once the session tab is closed, memory buffers are immediately purged.

Q3.Do I need to install apps on macOS, Windows, iOS, or Android?

No software installation is required. Textunnel operates 100% inside modern web browsers (Chrome, Safari, Edge, Firefox, Brave) across desktop and mobile devices.

Q4.Can I copy on Mac and paste on Windows or Android?

Yes! Unlike Apple Universal Clipboard which is strictly locked to Apple hardware, Textunnel bridges macOS, Windows 11, iOS, Android, and Linux seamlessly.

Q5.Is there any character limit for clipboard text or code snippets?

No artificial limits exist. You can copy long source code files, multi-megabyte JSON payloads, SQL dumps, or full articles with instant zero-truncation delivery.

Q6.How does Textunnel compare to sending messages to myself on Slack or WhatsApp?

Messaging apps permanently upload your sensitive clipboard data, passwords, and 2FA codes to corporate cloud databases where they remain in chat history. Textunnel operates via ephemeral point-to-point memory with zero cloud retention and zero account logins.

Q7.Does cross-device clipboard work if devices are on different networks?

Yes. When devices are on the same Wi-Fi or LAN, Textunnel transfers data over your high-speed local network. If devices are on separate networks (e.g. mobile 5G to office Wi-Fi), WebRTC securely routes encrypted traffic via NAT traversal.

Q8.Can I also copy images and files through this clipboard tool?

Yes. In addition to text, URLs, and code blocks, you can drag and drop images, screenshots, and multi-gigabyte files directly into the transfer window for instant streaming.

Q9.Do keyboard shortcuts (Command+C vs Ctrl+V) work seamlessly?

Yes. Simply press Command+C on macOS or Ctrl+C on Windows/Linux. Pasting into Textunnel automatically broadcasts the text, and clicking the one-click copy button on the target machine places it directly onto that OS clipboard.

Q10.Is clipboard history saved in the browser?

Textunnel displays an ephemeral session history in your active browser tab for convenience. As soon as you refresh or close the tab, all history is wiped clean.