Sacred Frequency is a free set of sound healing tools that run entirely in your browser. Play any of the nine Solfeggio frequencies from 174 Hz to 963 Hz, tune the seven chakras in sequence, generate any tone between 20 Hz and 20 kHz, or set a meditation timer with a breathing guide.
Nothing is streamed and nothing is downloaded. Each tone is synthesised on your own device with the Web Audio API, which is why sessions start instantly, keep working offline, and never tell us what you listened to.
We describe what each frequency is traditionally used for rather than what it does to your body. Solfeggio frequencies are a modern spiritual tradition, not established science, and the widely repeated claims about repairing DNA are not supported by evidence. Sitting still with a steady low tone for fifteen minutes is worth doing on its own terms.
| Frequency | Traditionally used for | Centre |
|---|---|---|
| 174 Hz | Pain Relief. The lowest of the Solfeggio frequencies. Practitioners reach for 174 Hz when something hurts or when the day has been too much — it is a deep, grounding tone, and low steady sound at low volume is genuinely settling. | Earth Star |
| 285 Hz | Restoration & Repair. Traditionally associated with restoration and recovery. 285 Hz is the tone practitioners choose when the intention is repair — of the body, or of a week that got away from them. Still low enough to feel more like a hum than a note. | Root |
| 396 Hz | Liberation from Fear. The tone most often chosen for anxiety, because it is traditionally associated with letting go of guilt and fear. If you only ever use one frequency on an anxious day, most practitioners would point you here. | Sacral |
| 417 Hz | Facilitating Change. Traditionally the frequency of change — used when something needs to shift and has not yet. Practitioners associate it with clearing out what a difficult period left behind, and with getting unstuck. | Solar Plexus |
| 528 Hz | Transformation & Repair. Known as the "Miracle" tone or the Love Frequency, 528 Hz is the most widely used Solfeggio frequency. Practitioners associate it with transformation, clarity and inner peace, and it is the frequency most often chosen for heart-centred meditation. | Heart |
| 639 Hz | Connecting Relationships. Traditionally the relationship tone — associated with communication, patience and repair between people. A common choice before a conversation you have been putting off. | Throat |
| 741 Hz | Expression & Solutions. Leads to a healthier, simpler life. Associated with clearing mental clutter, it is traditionally used for self-expression, problem solving and spiritual awakening. | Third Eye |
| 852 Hz | Spiritual Order. Awakens intuition and returns spiritual order. It is used to raise awareness and return to spiritual order, encouraging a shift from fear-based thinking toward trust. | Crown |
| 963 Hz | Divine Consciousness. The highest Solfeggio frequency, connected with light and pure awareness. It is traditionally used to encourage a sense of unity, stillness and connection to something larger than the self. | Soul Star |
They are nine specific tones: 174, 285, 396, 417, 528, 639, 741, 852 and 963 Hz. The middle six were identified in the 1970s in a Latin hymn to John the Baptist, and 174, 285 and 963 Hz were added later by practitioners to extend the scale. They are a modern spiritual tradition rather than an ancient one, and listening to them is a relaxation practice.
Yes, completely. There is no account, no trial, no time limit and no paid tier. Every tone is generated by your own browser, so there is nothing to stream and nothing to sell you.
Pick 528 Hz for a general first session, 396 Hz if you are anxious, or 174 Hz if you want to wind down for sleep. Ten minutes at a volume quiet enough to talk over is a better starting point than the perfect number.
No. That claim is repeated widely online and there is no evidence for it. What is well supported is simpler: sitting still, breathing slowly and listening to a steady low sound calms the nervous system. That is worth doing on its own terms and it does not need an invented mechanism.
Not for single tones, though headphones make low frequencies like 174 Hz much easier to hear. Binaural beats do need headphones — the effect depends on each ear receiving a slightly different tone, and on speakers the two mix in the air before they reach you.