Last updated: 2026-07-09
Typing a six-digit code is fast, but scanning is faster still — point a phone camera at the screen and the transfer is set up before you'd have finished typing. Relayium's pairing flow shows a QR code alongside every pairing code for exactly this reason.
This is the cross-network flow: it works whether both devices are on the same Wi-Fi or on opposite sides of the planet. The QR is just a shortcut into that flow — the code and the link underneath it work exactly the same way if scanning isn't convenient.
On the sending device, open relayium.com and sign in — creating a pairing code is the one place Relayium asks for an account, because the code has to belong to someone. Pick a file, a folder, or just connect without files queued yet.
Relayium mints a short numeric code and, right next to it, renders a QR code. The QR doesn't encode anything new — it's the same join link the "copy link" button gives you, just rendered as a scannable square instead of text. Whoever opens that link lands straight in your pairing room.
On the other device, open the camera app (or any QR scanner) and point it at the screen. Tapping the notification that pops up opens the link in a browser, which joins the room automatically — no typing, no relayium.com account for the person scanning, and nothing to install.
If a camera isn't handy, the same link works pasted into any browser, and the six-digit code works typed into the "enter code" box on relayium.com. The QR is a convenience layered on top of both, not a separate mechanism — pick whichever is easiest in the moment.
Scanning only gets the two devices into the same room; the transfer itself is unchanged from any other pairing-code session. The devices negotiate a direct peer-to-peer connection and derive a shared key with an X25519 key exchange, then encrypt every chunk with AES-256-GCM.
Both screens show the same short verification code (SAS) — glance at both and confirm they match before trusting the connection; it's how you catch a malicious relay standing in the middle. When a direct path isn't possible across the two networks, the encrypted stream falls back to a TURN relay, which only ever sees ciphertext, never your files. Each file is checked end-to-end with a SHA-256 hash, and a dropped connection can resume instead of restarting.
Cameras misfire, lighting is bad, or one device just doesn't have a camera handy — none of that should block the transfer. The pairing card on the sending device also shows copy buttons for the raw code and the link (and a share-sheet button on devices that support it), plus a countdown until the code expires.
Retype the code, paste the link, or use the share sheet to send it another way (chat, AirDrop, whatever's fastest) — every path lands in the same room and gets the same direct, encrypted connection. The QR is one entry point among several, never a requirement.
No. Only the sender signs in to create the pairing code and its QR. Whoever scans it just joins the room that was already created — no account, no sign-up, nothing to install.
The same join link the "copy link" button copies — a relayium.com URL with the pairing code baked in. Scanning it just opens that link in the browser, which joins the room automatically.
Yes, it's the identical connection either way. Both devices still negotiate an X25519 key exchange, encrypt with AES-256-GCM, and show a matching SAS verification code you should check before trusting the transfer. The QR only changes how you get into the room, not how the transfer is secured.
Nothing is lost — the same pairing card shows the raw code and a copyable link, and a share-sheet button on supported devices. Any of them opens the same room as the QR.
Yes. This is the cross-network pairing flow, so it works whether both devices share a network or not. Relayium connects them directly when it can, and only falls back to an encrypted relay when a direct path isn't possible.
Open Relayium, create a code, and try scanning the QR with another device — no app, no account needed for the person scanning.
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