Air Handoff Modern is a browser-based acoustic transfer tool that lets two devices exchange encrypted text payloads over speaker and microphone using tone-based signaling. It is designed for quick offline handoff experiments, air-gap style relay workflows, and privacy-focused demos without requiring a traditional network connection during transfer.
The app prepares a message, encrypts and authenticates it, converts the frame into audio tones, and sends repeated bursts through the air for better reliability. On the receiving side, the app listens through the microphone, detects the expected tones, reconstructs the frame, validates it, and decrypts it with the matching passphrase. Profile modes help tune speed and resilience for different devices and environments.
Modernized visual system, more legible spacing, profile-driven frequencies, repeat bursts for retransmission, cleaner mic constraints, live recommendations, and stronger affordances for phone-to-phone use.
Use Balanced first. If decode fails, switch both sides to Robust, increase the bit duration, and keep environmental audio processing reduced. Stealth is intentionally experimental and may not work on every device.