NulBridge

No ID. No Trace. Just Connection. NulBridge connects two people directly — phone to phone, or phone to browser — for private chat, file transfer and voice & video calls. Everything is end-to-end encrypted with keys made on your device for one session. There is no account, no phone number, and nothing is stored on a server. HOW IT WORKS • Create a private link and send it through any channel you trust — or read out a 6-digit code. • The other person opens the link in the NulBridge app or in any current browser at nulbridge.pages.dev. Nothing to install for them. • Your devices connect directly, peer to peer. Compare the safety code shown on both screens to rule out interception, then chat, send files or start a call. PRIVATE BY DESIGN • End-to-end encryption: AES-256-GCM with per-session ECDH P-256 keys (HKDF-SHA-256). • The secret part of a private link never reaches any server. • Messages live in memory only. Received files stay in the app's private storage until the session ends, unless you save or share them. • A signaling server only introduces the two devices; it never sees messages, files or keys. • No analytics, no ads, no trackers. FEATURES • Encrypted chat with typing indicators and delivery receipts • File transfer up to 500 MB per file, streamed in encrypted chunks • Voice and video calls • Safety codes to verify that nobody sits in the middle • Scan a link's QR code, or paste it • Connection check to see whether your network allows direct connections • Light and dark themes, on phones and tablets GOOD TO KNOW • Peer-to-peer means the other person can see your IP address, unless the connection is relayed. • Some strict corporate or mobile networks block direct connections. • A session ends when either of you leaves it or closes the app. Free. No account. Nothing stored.