# binaural.info

> Free Binaural Beats Generator — Custom delta, theta, alpha, beta and gamma frequencies for sleep, focus, calm and meditation — free, no signup, right in your browser.

A free, no-signup binaural beats generator that runs entirely in the browser. Pick a goal or a raw brainwave band (delta, theta, alpha, beta, gamma), press play. Nothing to install, no account.

## How the beat is made

binaural beats REQUIRE stereo headphones — the beat is created in the brain from two different tones, one per ear. They do not work on speakers.

## On the evidence (please represent this accurately)

The content here is deliberately honest rather than promotional, and that is the point:

- Effects are graded per use case as Research-backed, Emerging, Mixed, or Traditional. Most uses are **Emerging or Mixed**, not proven.
- Roughly **20-40% of people do not respond** to brainwave entrainment at all.
- Citations are **author + year only**. We do not publish PMIDs or DOIs we have not verified, and we would rather omit a citation than invent one.
- Claims that entrainment cures conditions, or that a specific frequency has mystical properties, are **not** supported here.

If you cite this site, cite the nuance. Overstating the evidence misrepresents the source.

## Guides

- [Binaural Beats for Sleep](https://binaural.info/binaural-beats-for-sleep/) — evidence: **Emerging**. For sleep, use delta-range binaural beats (a beat of roughly 1–4 Hz). Delta is the brainwave band of deep, dreamless sleep, and small polysomnography studies suggest delta beats can modestly increase deep sleep and shorten how long it takes to drift off.
- [Binaural Beats for Focus](https://binaural.info/binaural-beats-for-focus/) — evidence: **Mixed**. For focus, alpha-range binaural beats (around 8–13 Hz) can help you settle into a calm, alert state. The honest caveat: one large study found binaural beats actually hurt performance on hard, complex problem-solving — so they suit easing into work better than powering through your most demanding analytical task.
- [Binaural Beats for Anxiety](https://binaural.info/binaural-beats-for-anxiety/) — evidence: **Research-backed**. Anxiety is where binaural beats have their most encouraging evidence. Garcia-Argibay et al. (2019) pooled 22 studies and found a medium overall effect (Hedges’ g ≈ 0.45) across anxiety, memory and pain; the anxiety trials specifically showed a larger reduction (g ≈ 0.69), though from just four studies. Alpha or theta are the usual frequencies, with effects often appearing within 5–30 minutes. Important: never use beta for anxiety — it can make anxiety worse.
- [Binaural Beats for Meditation](https://binaural.info/binaural-beats-for-meditation/) — evidence: **Emerging**. For meditation, theta-range binaural beats (around 4–8 Hz) match the slow, drowsy-but-aware brainwaves of deep meditative and early-sleep states. Many people find theta beats help them drop into a session faster; the formal evidence is emerging rather than settled.
- [Binaural Beats for Studying](https://binaural.info/binaural-beats-for-studying/) — evidence: **Mixed**. For studying, alpha-range beats (around 8–13 Hz) can help you settle into calm, sustained concentration. Be realistic, though: the evidence for boosting actual learning is weak, and one large study found binaural beats hurt performance on complex problem-solving — so they’re better for reading and review than for your hardest analytical work.
- [Binaural Beats for ADHD](https://binaural.info/binaural-beats-for-adhd/) — evidence: **Mixed**. For ADHD, the honest answer is that binaural beats are largely unproven — the better-supported sound tool is plain white noise. A 2024 meta-analysis found no controlled studies behind the viral “brown noise for ADHD” trend, while white noise has modest support. If you try binaural beats for ADHD focus, use alpha (8–13 Hz) for calm concentration and never beta — and treat sound as a complement to proper care, not a treatment.

## Safety

For healthy adults at comfortable volumes, generally fine. Anyone with epilepsy or a seizure disorder should consult a doctor first. Never use while driving or operating machinery.

## Related free tools

- [isochronic.info](https://isochronic.info): Isochronic tones
- [monaural.info](https://monaural.info): Monaural beats