Start
Pick a name once and it's remembered. You get a session with a 6-digit code that lasts 10 minutes.
Tether: sync clipboard & share files between 2–4 devicesCopy on one.
Paste on the other.
Link your laptop, your phone, or a friend's machine with a 6-digit code or a QR scan. What you copy on one shows up on the others, and files drop straight across. Browser to browser, nothing uploaded.
You get a code and an invite link.
- Peer-to-peer
- Encrypted
- No uploads
- No sign-up
How to tether your devices
Link up
Read the code out, or send the invite link, which skips the code. Up to 4 people per session.
Copy, paste, send
Copy something and come back to the tab, or press CtrlV on the page. It lands on everyone else's clipboard. Drop a file and it goes to them too.
Private by design
Nothing sits in the middle.
Tether links your browsers to each other, not to a cloud. Files and clips travel over a direct, encrypted connection, so there's no upload, no copy left on a server, and nothing for anyone to leak later.
Serverless transfer
Files go straight from your browser to theirs over WebRTC. They're never uploaded, so there's nothing stored to delete.
Encrypted on the wire
Every link is encrypted with DTLS, the same standard behind video calls in your browser. Keys are made fresh for each connection.
No accounts
No email, no password, no profile. Your name lives in a cookie on your own device, and nowhere else.
Short-lived by default
Join codes expire after 10 minutes, rooms hold 4 people at most, and idle sessions vanish after 12 hours.
About Tether
What is Tether? A secure tether connection between your devices.
Tether is a free web app that links your computers and phone into one private session, so you can sync your clipboard, send text and share files between them in seconds. There is nothing to download and no account to create: open tethersecure.com on one device, start a session, and join from the other with a 6-digit code, an invite link or a QR scan. From that moment on, whatever you copy or drop on one device can be pasted or saved on the others.
Sync your clipboard across Windows, Mac, Linux and phones
Most clipboard tools only work inside one ecosystem. Tether runs in the browser, so it gives you a shared clipboard across every platform: connect Windows and Mac, a Linux workstation and a Chromebook, or an Android phone and an iPhone. Copy a link, a command or a paragraph on your desktop, switch to the Tether tab, and it is on your laptop's clipboard, ready to paste. Every clip also stays in a shared list for the session, so you can copy it again with a single click.
Share files securely, without uploading them
When you send a file with Tether, it is not uploaded to a cloud drive, an email server or a chat app. Tether files travel in small encrypted pieces over a direct WebRTC connection from your browser to the other device's browser, where it appears with a Save button. That makes Tether one of the simplest ways to securely share a file: there is no copy stored online, no public link that could leak and nothing to clean up afterwards. You can send and receive files up to 500 MB each, in either direction, between any of the connected devices.
Connect your PCs as a small group
A session is a group connection of up to four devices. Your work laptop, home PC and phone can all be tethered at once, or you can link up with a teammate for a quick hand-off. Everyone sees who is online and, if they choose, which app they are working in. Send text or files to the whole group, or drop a file on one person's card to send it only to them. The devices do not need to share a Wi-Fi network: any PC that is online can join from anywhere over the internet.
Send text, send files, receive files: any direction
Use the box to type and send a message, press Ctrl+V on the page to send whatever is on your clipboard, or drag and drop files anywhere in the window. On a phone, install Tether from the browser and it shows up in your Share menu, so you can tether photos, PDFs and links straight from other apps. Turn on notifications and you will know the moment something arrives, even when Tether is in the background.
Private by design
Every link between devices is encrypted with DTLS, the same standard that protects video calls in your browser, with fresh keys for each connection. Tether's server only introduces the devices to each other and keeps the session's code and names; it never sees your files. Join codes expire after ten minutes, and sessions are deleted after twelve hours of inactivity. There are no ads and no sign-up, just a display name saved in a cookie on your own device.
When to tether it
Developers use Tether to move commands, logs and code snippets between machines. Designers drop exports onto a colleague's PC. Students send notes from a laptop to a phone, and anyone can move a screenshot from a Mac to a Windows PC without emailing themselves. If you have ever wished for an AirDrop alternative that works between Windows, Android, Mac and iPhone, or a quick way to make a PC-to-PC online connection without setting up a network share, just tether it.
FAQ
Frequently asked questions.
What is Tether?
Tether is a free web app that connects your devices so you can sync your clipboard, send text and share files between them. You start a session, the other device joins with a 6-digit code, an invite link or a QR scan, and from then on whatever you copy or drop on one device reaches the others directly, browser to browser.
Is Tether free to use?
Yes. Tether is free, needs no account and has no ads. You only need a modern browser on each device.
How do I sync my clipboard between two computers?
Open tethersecure.com on both computers, press Start a session on one and enter the 6-digit code on the other. Copy text on either computer and switch back to the Tether tab (or press Ctrl+V on the page): it lands on the other computer's clipboard and stays in the shared list with a copy button.
Can I connect Windows and Mac with Tether?
Yes. Tether runs in the browser, so it connects Windows, macOS, Linux, ChromeOS, Android and iPhone in any combination. Copy on a Windows PC and paste on a Mac, or send a file from a MacBook to a Windows laptop, without installing anything.
How do I send a file from my phone to my PC?
Start a session on your PC and scan the QR code with your phone's camera to join. Then tap Send file on your phone, or drop files on the page on your PC: they transfer straight across and appear with a Save button. If you install Tether from your phone's browser, you can also use the phone's Share menu and pick Tether.
Is it safe? Are my files uploaded anywhere?
Files are never uploaded. They travel over a direct, encrypted WebRTC connection (DTLS) between the browsers in your session, and Tether's server never sees them. Text clips use the same direct connection and only pass through the server, without being stored, if a direct link is impossible on your network.
Do I need to install an app or create an account?
No. Tether works in any modern browser with no download, no sign-up and no email. You just pick a display name, which is remembered in a cookie on your own device. You can optionally install it as an app on your phone or computer for quicker access.
How many devices can I connect at once?
A Tether session is a small group connection of up to 4 devices. Everyone in the session can send text and files to everyone else, or you can send a file to just one person by dropping it on their card.
Is there a file size limit?
You can send files up to 500 MB each. Because files go directly between devices instead of through a server, larger transfers are limited mainly by your connection speed and the memory of the receiving browser.
Does Tether work when the devices are on different networks?
Yes. Devices do not need to be on the same Wi-Fi or LAN; any two PCs online can tether over the internet. A few strict corporate or mobile networks block direct connections; on those, text still arrives through a short-lived relay, while files need a direct link and Tether will tell you if one is not available.
Why does my clipboard sync when I switch back to the Tether tab?
Browsers only let a website read your clipboard while its tab is in front, for your privacy. So after copying in another app, switch to the Tether tab (in Chrome and Edge it then syncs automatically) or press Ctrl+V on the page. Incoming clips are written to your clipboard the moment you return to the tab.
Is Tether an AirDrop alternative for Windows and Android?
Tether covers the same everyday job, quickly moving text, links, photos and files between nearby devices, but it works across every platform, including Windows to Mac and Android to iPhone, and also across different networks.
Guides
More ways to tether.
Clipboard syncSync your clipboardSync your clipboard between PCs, Mac and phone in seconds. Copy on one device, paste on another. Peer-to-peer, encrypted, no app or account needed.Secure file sharingSecurely share filesSend and receive files securely between your PCs, Mac and phone. Direct, encrypted, peer-to-peer transfer up to 500 MB. Nothing uploaded, no sign-up.Windows ↔ MacConnect Windows and MacConnect a Windows PC and a Mac in seconds. Share clipboard, send text and transfer files between Windows and macOS in the browser. Free, no install.Phone ↔ computerSend files from phone to PCSend photos, files and text from your Android or iPhone to your PC or Mac, and back. Scan a QR code to connect. Direct, encrypted, no app needed.Send textSend text between devicesSend text, links and code snippets between your computers and phone instantly. A private online clipboard, peer-to-peer and encrypted. Free, no sign-up.Connect your PCsConnect your PCsConnect up to 4 PCs, Macs and phones in one secure group session over the internet. Share clipboard, text and files with everyone. Free, no install.
What a browser can and can't do
No install, so a few rules apply.
- Syncing happens when you switch to the tab. Browsers only let a page read your clipboard while it's in front, so switch to Tether after copying and it sends. In Firefox and Safari, press CtrlV on the page.
- Incoming clips land when you switch to the tab. Everything received also stays in the list, one click to copy.
- You set your own status. A website can't see which app you're using, so you pick it: VS Code, Figma, whatever.
- Files never touch a server. They need a direct link. Text clips use one too, and only fall back to a relay if a direct link can't be made, where they're deleted after two minutes.