Hard-Chat, developed by the Hardlint Cybersecurity Team, is a zero-trace, serverless P2P terminal chat running entirely in the browser. It requires no accounts, servers, or stored history. The tool establishes a direct WebRTC connection between two devices using a single shared 100-character Room Key exchanged out-of-band.

Messages are protected with end-to-end encryption using AES-GCM 256-bit keys derived via PBKDF2 with 100,000 iterations. A Panic Purge button instantly wipes keys and visible history. Connectivity relies on 18 STUN/TURN servers to traverse restrictive NATs.

The static application is hosted on GitHub Pages and uses PeerJS for signaling. The Hardlint team emphasizes this is for educational purposes and does not guarantee network-level anonymity; a trustworthy VPN is strongly recommended. Users must access the page via HTTPS on modern browsers supporting WebRTC and Web Crypto API.

Room Keys expire automatically after two minutes if a connection fails.