I built a free P2P device sync tool — no account needed, just scan a QR code

I got tired of emailing files to myself. Every time I needed to move a photo from my phone to my laptop I had to either send it via WhatsApp Web, upload to Google Drive, or email it to myself. All of these require accounts, have storage limits, and are honestly overkill for "I just need this file on my other screen right now." So I built VaultSync — ( https://vsyn.cc ) The whole concept fits in one sentence: Open the same URL on two devices, scan the QR code, and they're connected — no account, no app, no waiting. That's it. The QR code encodes a session URL. When Device B scans it, both browsers join the same WebRTC signaling channel, negotiate a direct connection, and start syncing. How the connection works When you open vsyn.cc, the server generates a unique session token and embeds it in the QR code. After the handshake, the signaling server steps out completely. Data flows directly between browsers using WebRTC Data Channels. Text sync The textarea syncs in real time across both d