Free binaural beats generator: hear your first beat right now.
Real-time audio synthesis at your device’s own sample rate, five brainwave presets and any frequency you like, with no setup and no signup. Put on stereo headphones and press play. Sessions here run up to twenty minutes; the mobile app removes the limit and adds the full preset library.
Two tones, one per ear. Stereo headphones required — on speakers the two tones mix in the air and the effect is gone.
A live trace of both channels summed, about 45 milliseconds at a time — while stopped it previews what your current settings will produce. Note what it cannot show you: in binaural mode each ear receives one steady tone and the beat is reconstructed in your brainstem, so it is something you hear rather than something a waveform contains. In isochronic mode the pulsing is real and visible here.
Audio fades out over the last few seconds rather than cutting off.
A noise layer masks the room around you without covering the tone. Same generators as the noise colour pages.
Move either slider to leave the presets and dial in your own. For binaural beats the carrier barely matters — the beat is what does the work — though the illusion is clearest with a carrier under about 1000 Hz, which is why the slider stops there.
Space play/pause · ↑↓ volume · M mute · 1–5 presets
That’s 20 minutes.
Browser sessions cap at twenty minutes so this page stays free for everyone. The app runs as long as you like, works offline, and remembers your sessions across devices.
Want the unlimited version?
The mobile app adds 44 expert-tuned presets, 34 ambient sound beds, progressive wake-up alarms, offline synthesis, and unlimited session length. Free. Not sure which to use? Read the full web vs mobile app comparison — it covers the five presets here against the 44-preset app library, feature by feature.
Evidence-led
Every claim traced to a named study in the research hub — including the null results.
Real-time synthesis
Generated live in your browser at your device’s native sample rate — not pre-recorded MP3 loops.
No account needed
Nothing to sign up for. Audio is synthesised on your device and your session history never leaves it. This page does run ads and analytics — see the privacy policy.
Works offline
The full app runs with zero internet after download. Airplane-ready.