Free Online Isochronic Tones Generator
Create custom isochronic tones for focus, relaxation, and sleep.
No headphones needed — just press play and start instantly.
Free to use · No account required · No headphones required
Preset Library
Load a preset with recommended settings.
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 pulse repeats.
Carrier Frequency: The base tone used to generate the rhythmic pulses.
Timer: Sets when the session stops. WAV export supports sessions up to 60 minutes for stability.
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If this session helped you find your flow, consider supporting the project to help keep the generator running for everyone.
Looking for binaural beats? Try the Binaural Beats Generator →
How to Use the Generator
- Start with a preset or customize all settings manually.
- Adjust the beat, carrier frequency, and ambient sound as needed.
- Set the session duration and volume levels.
- Press play to start your session.
- Listen through speakers or headphones.
- Creates a link to reuse your exact settings anytime.
- Download your session for offline listening if needed.
How Isochronic Tones Work
Isochronic tones use a single carrier tone that pulses on and off at a steady rhythm, creating a clear and consistent auditory pattern.
This rhythmic stimulation is commonly associated with relaxation or focused attention.
Frequently Asked Questions
Common questions about isochronic tones and this generator.
Do I need headphones for isochronic tones?
No. Isochronic tones do not require headphones and can be played through speakers.
How long should I listen to isochronic tones?
If you’re new, start with 5–10 minutes. Many users prefer sessions of 15–25 minutes once they become familiar with the experience.
Isochronic tones have a more direct rhythmic character, so some users prefer slightly shorter sessions. Longer sessions are possible at comfortable volume levels, especially for focus or structured practice.
Which frequency should I choose?
Choose a frequency based on your goal (sleep, relaxation, focus, or energy). Headphones are not required. You can explore detailed explanations on our page about isochronic tone frequencies.
Learn more about brainwave frequencies →Are isochronic tones safe?
Generally yes, when used responsibly and at comfortable listening levels.
Do not use if you have epilepsy or a history of seizures. Isochronic tones involve direct rhythmic pulses, which may feel more intense for some users. If you have a medical condition, are pregnant, or use a pacemaker, consult a healthcare professional before use.
Avoid listening while driving or operating machinery, as isochronic tones may affect alertness or relaxation levels.
Why is the download limit set to 60 minutes?
While you can stream sessions up to 8 hours directly in your browser, the "Download" function is limited to 60 minutes. Generating high-quality audio files is a resource-intensive process for browsers. This limit ensures that the generation is stable and doesn't crash your device.
How does PureBinaural generate and process audio?
PureBinaural generates precise isochronic tones in real time using the Web Audio API. A single tone is pulsed on and off at the selected frequency to create a clearly defined rhythmic pulse.
Sessions are rendered at 44.1 kHz and normalized to safe listening levels. Smooth fade-in and fade-out are applied to ensure a comfortable listening experience.
Is using PureBinaural private?
PureBinaural runs entirely in your browser (client-side), meaning no audio data ever leaves your device or is sent to a server.
No accounts, no cookies, and no personal data collection. Sessions are generated locally on your machine for 100% privacy.
To help improve the project, we use basic, anonymous usage statistics that do not track or identify you in any way.