I built Iriszip, an encrypted P2P file transfer that runs in the browser

I wanted a simple way to move a file between two devices without installing an app, creating an account, or uploading it somewhere first.

So I built Iriszip.

Open the site on both devices, scan a QR code or enter the 9-digit pairing code, and send files or text directly from the browser.

On the same network, transfers can stay device-to-device and run at LAN speed. Across the internet, Iriszip tries a direct WebRTC connection first and falls back to a relay when a direct connection isn't possible. The relay only handles ciphertext.

No file or message content is persisted on the server. On relayed connections, encrypted data only passes through memory, and session state is discarded when the session ends.