GUIDEPrivate Chat Without a Phone NumberWhat phone-number-free communication changes, what it does not change, and when a direct invitation is useful.GUIDEHow Encrypted File Sharing WorksA practical explanation of authenticated encryption, chunking, expiry and recipient risk.GUIDEHow Private Voice and Video Calls WorkWebRTC, signalling, ICE, STUN and TURN explained.GUIDEDisappearing Messages: What They Can and Cannot DoRetention controls, recipient copies and sensible expectations.GUIDEHow Chat256 Encryption WorksA technical walkthrough of ECDH, HKDF, AES-GCM, identity signatures and TLS.
Product documentation
See the features overview, security architecture, calling guide and file-transfer guide.
A useful rule
The best privacy documentation is precise about the boundary. Encryption can protect a message; it cannot make a recipient trustworthy, a device uncompromised or a network invisible.
Core product guides
START HEREGetting Started with Chat256Private chat, identity, files, calls, Workspace and disappearing messages in one practical walkthrough.IDENTITYIdentity and SessionsUnderstand persistent identity, authenticated sessions, verification, recovery and contact safety.PRIVACYPrivacy by DesignUnderstand content encryption, metadata, device risk and recipient risk without overpromising anonymity.TECHNICALTechnical ArchitectureA layer-by-layer explanation of browser cryptography, sessions, media, calls, billing and administration.TROUBLESHOOTINGCalling TroubleshootingMicrophone, camera, WebRTC, STUN, TURN and network troubleshooting.