Binaural Beats Generator — Focus, Sleep & Relax Free
A binaural beat is not a sound you hear directly: play a 200 Hz tone in one ear and a 210 Hz tone in the other, and your brain perceives a gentle 10 Hz pulse. Different pulse rates are traditionally linked with different states — deep sleep, meditation, calm focus, or alert concentration. Pick a preset below, press play, and listen with headphones (the effect needs separate left and right channels). Everything is synthesized live with the Web Audio API in your browser — no audio files, no uploads, no sign-up.
Binaural Beats Generator
Two tones, one beat in your brain — focus, relax, or drift off, with headphones on.
1 Choose your session
Headphones are required — speakers mix the two tones before they reach your ears, and the effect disappears. Start at low volume.
2 Beat settings
3 Play your beat
✅ Done
How it works
Press Play Binaural Beat and the tool creates two sine-wave oscillators with the Web Audio API: one panned hard left, one hard right, separated by exactly your beat frequency. Your brain perceives the difference as a pulse at that rate — the binaural beat. Sliders update the tones live while playing, so you can drift from a 10 Hz calm-focus beat toward 6 Hz meditation without stopping. Stop at any time; nothing is recorded or uploaded, and no audio file is involved at all.
Everyday uses
- Focus sessions — a steady beat behind deep work.
- Meditation — theta and delta presets for wind-down routines.
- Sleep — low delta tones as a sleep aid (with a sleep timer on your device).
- Study blocks — alpha beats during revision.
- Curiosity — hear what a binaural beat actually sounds like.