Free Isochronic Tones Generator
Create custom audio with this free isochronic tones generator for focus, relaxation, meditation, sleep, and concentration.
Start instantly in your browser with adjustable frequencies, ambient sounds, and no headphones required.
No account required • No tracking • Runs in your browser
Preset Library
Start with ready-made sessions for focus, relaxation, and sleep.
Relax
Stress Relief
5 Hz · 25 min Theta · Forest RainCalm Mind
6 Hz · 20 min Theta · Forest RainBreath Sync
7 Hz · 15 min Theta · Forest RainFocus
Deep Work
14 Hz · 45 min Beta · Brown NoiseSteady Focus
10 Hz · 25 min Alpha · Brown NoiseStudy Flow
12 Hz · 30 min Alpha · Brown NoiseCreative Focus
8 Hz · 20 min Alpha · Brown NoiseSleep
Lucid Drift
3 Hz · 25 min Delta · Forest RainPower Nap
4 Hz · 20 min Delta · Forest RainDeep Sleep
2.5 Hz · 30 min Delta · Forest RainNight Reset
1.5 Hz · 45 min Delta · Forest RainEnergy
Quick Recharge
15 Hz · 12 min Beta · Clean ToneMorning Boost
16 Hz · 15 min Beta · Clean ToneActivation
18 Hz · 10 min Beta · Clean TonePre-Workout
20 Hz · 10 min Beta · Clean ToneIsochronic Generator
Create custom binaural beat sessions directly in your browser.
Playing
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What these settings do
Beat Frequency: Controls 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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If it helps you, consider supporting the project to keep it running.
Using headphones? Open the Binaural Beats Generator →
How to Use the Isochronic Tones Generator
- Start with a preset or customize all settings manually.
- Adjust the beat, carrier frequency, and ambient sound.
- Set the session duration and volume levels.
- Press play to start your session.
- Listen through speakers or headphones.
- Save your session to reuse the same settings anytime.
- Download your session for offline listening if needed.
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 PureBinaural generate the audio?
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.