You’re session #— — transfers
a file to someone
Receive
type the code
Bridge active
30
Your side
Sender
Drop file here
Sealed
Their side
Receiver
Waiting for them to choose a file…
Received
Sealed on your device. Through the bridge. Unsealed on theirs. We're just the pipe.

How it works

1

Share a four-character code

Tap Send and you get a short code like K7QF. Say it, text it, or share the link — that’s the whole setup. No accounts. No uploads. No waiting.

2

Your devices agree on a secret — privately

When they enter the code, both browsers perform a key agreement (ECDH) directly with each other. The key is created on your devices and never travels anywhere. A quick picture-match confirms you’re talking to the right person — not an impostor.

3

Sealed, crossed, gone

Your file is encrypted on your device with AES‑256‑GCM, streamed across the bridge, and unsealed only on theirs. The relay passes sealed bytes it cannot read and never stores. When the session ends, nothing remains — anywhere.

End‑to‑end encrypted
AES‑256‑GCM · keys made on‑device, never transmitted
Nothing stored
bytes pass through the bridge and never touch a disk
Nothing to manage
no accounts · sessions expire on their own