Free Isochronic Tones Generator for Focus, Sleep & Relaxation
Start with ready-made sessions for focus, sleep, and relaxation, or create your own custom isochronic tones.
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Preset Library
Choose a preset and start listening in seconds.
Relax
Stress Relief
Reduce tension and mental fatigue Theta · 5 Hz · 25 minCalm Mind
Quiet racing thoughts and mental chatter Theta · 6 Hz · 20 minBreath Sync
Gentle breathing and mindfulness Theta · 7 Hz · 15 minFocus
Deep Work
Sustained concentration for demanding tasks Beta · 14 Hz · 45 minSteady Focus
Calm attention without mental strain Alpha · 10 Hz · 25 minStudy Flow
Focused learning and information retention Alpha · 12 Hz · 30 minCreative Focus
Relaxed concentration for creative work Alpha · 8 Hz · 20 minSleep
Lucid Drift
Gentle transition into deep sleep Delta · 3 Hz · 25 minPower Nap
Quick recovery and mental refresh Delta · 4 Hz · 20 minDeep Sleep
Deep rest and overnight recovery Delta · 2.5 Hz · 30 minNight Reset
Extended deep sleep support Delta · 1.5 Hz · 45 minEnergy
Quick Recharge
Fast mental reset and renewed alertness Beta · 15 Hz · 12 minMorning Boost
Start the day with energy and focus Beta · 16 Hz · 15 minActivation
Increase alertness and mental drive Beta · 18 Hz · 10 minPre-Workout
Boost energy before exercise or training Beta · 20 Hz · 10 minIsochronic Tones Generator
Create custom sessions with isochronic tones for focus, sleep, relaxation, and meditation.
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What these settings do
Brainwave Frequency: The target brainwave rate in Hz, controlling how many times per second the sound pulses.
Carrier Frequency: The base tone used to generate the pulses.
Ambient Sound: Optional background audio (rain, noise, etc.).
Tone Volume: Controls the volume of the pulses.
Ambient Volume: Controls the volume of the background sound.
Timer: Sets when the session stops (up to 60 minutes for WAV export).
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How Isochronic Tones Work
Isochronic tones use a single tone that pulses on and off at a steady rhythm, creating a clear and consistent pattern.
Your brain can follow this rhythm, which is often associated with relaxation, focus, or sleep.
Frequently Asked Questions
Answers about isochronic tones, safety, and how to use the generator.
Do I need headphones for isochronic tones?
No. Isochronic tones work through both speakers and headphones.
How long should I listen to isochronic tones?
If you’re new, start with 5–10 minutes. Many users prefer 15–25 minute sessions once they get used to it.
Because of their more direct rhythmic pattern, some users prefer shorter sessions. Longer sessions are fine at a comfortable volume.
Which frequency should I choose?
Choose a frequency based on your goal — sleep, relaxation, focus, or energy.
Headphones are not required. You can explore more details about frequencies below.
Learn more about isochronic tone frequencies →Are isochronic tones safe?
Generally yes, when used responsibly and at comfortable listening levels.
Avoid use if you have epilepsy or a history of seizures. If you have a medical condition, are pregnant, or use a pacemaker, consult a healthcare professional before use.
Do not use while driving or operating machinery, as isochronic tones may affect alertness.
Why is the download limit set to 60 minutes?
You can stream sessions up to 8 hours in your browser, but downloads are limited to 60 minutes.
Generating high-quality audio files is resource-intensive, and this limit helps ensure stable performance across devices.
How does the generator create isochronic tones?
PureBinaural generates isochronic tones in real time using the Web Audio API by pulsing a single tone on and off at the selected frequency.
Sessions are rendered at 44.1 kHz, normalized to safe levels, and include smooth fade-in and fade-out.
Is using PureBinaural private?
PureBinaural runs entirely in your browser, so no audio data leaves your device.
No accounts, no cookies, and no personal data collection.
We use only basic, anonymous usage statistics to improve the project.