🔒 Direct encrypted transfer — no server sees your file.
FileTunnel
Secure peer-to-peer file transfer
Connecting…
Connected
PDF, Word, Excel, PowerPoint, TXT, MD, JPG, PNG
Max 25 MB
0%
Sending…
✓ Sent!
🔒 Direct encrypted transfer — no server sees your file.
How FileTunnel works
FileTunnel lets you send a file from your phone to any nearby computer — instantly, with no account, no app, and no upload to a server.
The transfer
The computer shows a QR code. You scan it, pick a file, and it goes directly from your browser to the computer's browser over an encrypted peer-to-peer connection (WebRTC). The file never touches any server.
Why it is secure
End-to-end encrypted — WebRTC uses DTLS, the same encryption as HTTPS, for every transfer.
No server storage — file bytes travel peer-to-peer; nothing is stored or logged anywhere.
Integrity verified — a SHA-256 hash is computed before sending and checked on arrival. Any corruption or tampering is detected.
Ephemeral session — the connection ID is generated fresh each time and discarded when the session ends.
Signaling
To establish the connection, both browsers briefly exchange a small handshake message (no file data) via the PeerJS public signaling service. After that, the channel is direct and encrypted.
