Audio / Tones
Binaural Beat Generator (Online, with Timer)
Generate binaural beats in the browser: choose a carrier tone and the beat frequency, add soft background noise, and set a timer. Each ear hears its own tone, and the beat is the difference between them. Use headphones.
Binaural Beat Generator (Online, with Timer): Two sine waves are played, one in each ear, with frequencies the beat apart: a 200 Hz carrier and a 10 Hz beat give 195 Hz on the left and 205 Hz on the right. The brain combines them and hears a pulse at 10 Hz, which exists only in perception. The beat is labelled with the matching name of EEG frequency bands, from delta to gamma. Runs 100% locally in your browser with zero server file uploads.
- Category
- Everyday tools
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs entirely in your browser
Use headphones: each ear must hear only its own tone. Keep the volume low.
Left ear 195 Hz, right ear 205 Hz: a 10 Hz beat, in the alpha range of brain-wave names
Each ear gets a slightly different pure tone, and the brain hears a slow pulse at the difference between them, here 10 Hz. The beat exists only in perception, which is why speakers do not produce it. Claims that binaural beats change mood, sleep, or focus are not well supported by research; treat them as a curiosity or background sound, not a treatment.
The bands
EEG frequencies are grouped as delta (below 4 Hz), theta (4–8 Hz), alpha (8–13 Hz), beta (13–30 Hz), and gamma (above 30 Hz). The labels describe the beat frequency only; listening does not set your brain waves to it.
Carrier tones
Binaural beats are heard most clearly with carrier tones below about 1,000 Hz and beats below about 30 Hz. For plain background sound without beats, use the white noise generator.
How to use it
- Put on headphones and lower the volume.
- Set the carrier tone and the beat frequency, and optionally add background noise.
- Choose how long to play, then press play.
Privacy & limitations
Sound is generated in your browser.
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Frequently asked questions
Do binaural beats work?
The beat itself is real perception, first described by Heinrich Wilhelm Dove in 1839. Claims that it improves sleep, focus, or mood come from small and mixed studies, so treat it as background sound, not a treatment.
Why do I need headphones?
Through speakers, both tones reach both ears and mix in the air, making an ordinary beat rather than a binaural one.
Is it safe?
At low volume, for most people, yes. People with epilepsy, and anyone driving or operating machinery, should not use it.
Free tool · runs in your browser · no account required