Sine Wave Generator
Generate a pure sine wave tone from 0 Hz to 20,000 Hz. Free, online and works on any device.
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Online Sine Wave Generator
This sine wave generator plays one clean, pure tone at the exact frequency you choose. A sine wave has no harmonics, which makes it the reference signal for testing speakers and headphones, checking your hearing, tuning instruments and measuring rooms. Pick a frequency, press play and watch the wave on the live oscilloscope.
Sine Wave Generator Features
- •Pure sine wave — A single clean frequency with no harmonics, distortion or added overtones.
- •0 Hz – 20,000 Hz range — Cover the whole audible spectrum, from deep sub-bass to the highest treble, with a sine wave.
- •Musical note picker — Choose any note from C0 to B9 with the Note and Octave menus and the sine wave jumps to its exact pitch.
- •Stereo balance control — Pan the sine wave to the left or right speaker for channel and speaker placement checks.
- •Live oscilloscope — Watch the sine wave move in real time as you change the frequency.
- •Shareable settings — Copy a link or QR code that opens the same sine wave frequency, volume and balance.
- •No installation — Runs in your browser with the Web Audio API on desktop, tablet and mobile.
Uses of a Sine Wave Generator
- •Speaker and headphone testing — play a pure sine wave to find rattles, distortion and weak frequencies.
- •Subwoofer and room testing — use low sine waves to find room resonances and standing waves.
- •Hearing tests — check the lowest and highest sine wave frequencies you can hear.
- •Instrument tuning — play a reference note such as A4 (440 Hz) to tune by ear.
- •Ear training — compare sine wave notes to learn pitches and intervals.
- •Science and education — demonstrate frequency, pitch and amplitude with a clean wave.
Benefits of an Online Sine Wave Generator
- Free and instant — no downloads, no sign-ups, no cost. Open the page and play.
- Works on any device — responsive and touch-friendly on phone, tablet or desktop.
- Exact frequency control — type a value, use the arrows or drag the slider for any sine wave from 0 Hz to 20,000 Hz.
- Pick a note — select any musical note and octave to play its pure sine wave.
- Real-time visualization — see the sine wave live on the oscilloscope while it plays.
- Shareable settings — copy a link with your exact frequency, volume and balance.
- Always clean — the tone is generated in your browser with the Web Audio API, so there is no audio file to compress.
Why Choose Our Sine Wave Generator?
A focused tool that does one thing well: it plays a clean, accurate sine wave at the exact frequency or note you pick.
Precise Frequency
Set an exact sine wave frequency from 0 Hz to 20,000 Hz, or pick a note.
Pure Sine Wave
A single clean frequency with no harmonics or distortion.
Live Oscilloscope
Watch the sine wave in real time as you change the frequency.
Frequently Asked Questions
Safety Warning
Extremely low or high frequencies can potentially damage audio equipment and hearing. Always start with low volume and gradually increase. Do not use at maximum volume for extended periods. If you experience discomfort, stop immediately.