How would you like to feel?
Pick a state. Press play. We'll take care of the rest.
15 min · auto fade-out
Start low and adjust to a comfortable level.
Pick a state. Press play. We'll take care of the rest.
Start low and adjust to a comfortable level.
Brain Beats is a free, browser-based sound player for focus, relaxation, and sleep. It generates steady rhythmic tones — sometimes called brainwave entrainment or neural entrainment — that give your mind a calm, consistent pulse to settle into. There's nothing to install and no account to create: pick a state, press play, and the audio is generated live on your device. No headphones required.
Each mode on the player above is a curated preset tuned to a specific pulse rate, matched to the brainwave band associated with that mental state:
The one-tap player above uses monaural beats, which work through any speaker. If you want full control, the advanced studios offer three tone types with custom frequencies, presets, noise overlays, and timers:
Not sure which to choose? Read the comparison: binaural vs monaural vs isochronic.
Only for binaural beats. The one-tap player on this page uses monaural beats, which work through any speaker — your phone, a laptop, or a bedside speaker.
Yes — completely free, with no account, no ads, and no data collection. All audio is generated in your browser, and the app can be installed to your home screen and used offline.
Use Sleep (4 Hz theta) in the half hour before bed, with a 15- or 30-minute timer so it fades out on its own. More detail in our guide to sleep frequencies.
The evidence is mixed but genuinely interesting: some effects — like relaxation and improved sleep onset — have decent support, while others are still being studied. We keep an honest summary in do binaural beats actually work? and plain-language definitions in the glossary.
For most people, yes — it's just steady rhythmic audio at a volume you control. As a precaution, people with epilepsy or a history of seizures should check with a doctor before using rhythmic stimulation. Brain Beats is a relaxation tool, not a medical device or treatment.