Five Tone Modes In One Tool
Switch between a single steady tone, a log or linear sweep, an on and off pulse, two tones that beat or split across your ears, and full chords built on any root note.
- Single Tone
- Sweep
- Pulse
- Two Tones
- Chord
Free online tone generator and frequency generator. Play a sine, square, triangle or sawtooth wave from 1Hz to 20kHz, sweep, pulse or stack tones into chords, then download the sound as a WAV file.
One steady tone at the exact pitch you set. Type a number, drag the slider or pick a musical note. The note picker follows the tuning you choose.
The tone glides from a start pitch to an end pitch. Use a log sweep to hear every octave for the same time, or linear to move evenly in hertz.
The tone switches on and off in a steady rhythm. Set how long each beep lasts and the gap between beeps, or pick a preset.
A second tone plays a set number of hertz above the first. Mixed, the two tones beat against each other. Split, each ear gets one tone, like binaural beats on headphones.
Stack notes on top of the main frequency to build a chord. The main tone is the root, so pick a note first, then a chord type.
A tone generator makes a pure, steady sound at an exact frequency, measured in hertz (Hz). One hertz is one vibration per second, so a 440Hz tone moves your speaker cone back and forth 440 times every second. Low numbers sound deep, high numbers sound sharp.
This online tone generator builds each sound live in your browser with the Web Audio API. Nothing is streamed or recorded. You can change the pitch, the wave shape and the balance while the tone plays, and the oscilloscope shows the wave you are hearing.
People use a frequency generator to test speakers and headphones, tune instruments, check their hearing range, find buzzing parts in a room and teach how sound works.
It takes a few seconds to get any tone you need. Follow the line from left to right.
Turn your device volume down to about 30% before the first tone, and start the volume slider low too.
Type the number of hertz, drag the slider, press a preset or choose a musical note.
Sine is the smoothest. Square, triangle and saw add harmonics and sound brighter.
Press the round button or the Space key. Change the pitch and volume while it plays.
Download the tone as a WAV file, or copy a link that opens this exact setting.
Human hearing covers roughly 20Hz to 20kHz. Press play on any range to hear a tone from the middle of it, with the bar showing where it sits.
20Hz to 60HzFelt more than heard. Rumble from subwoofers, pipe organs and movie effects.
60Hz to 250HzThe body of kick drums, bass guitar and male voices.
250Hz to 500HzWarmth in most instruments. Too much sounds muddy.
500Hz to 2kHzWhere most of a voice sits and where ears are most familiar.
2kHz to 4kHzThe range ears are most sensitive to. Harsh when it is too loud.
4kHz to 6kHzClarity and edge on vocals, guitars and snares.
6kHz to 20kHzAir and sparkle. Fades first as hearing changes with age.
Every note in standard tuning has a fixed frequency. Press any number to play that note. Each octave up doubles the frequency, so A5 is 880Hz and A3 is 220Hz.
| Note | Octave 2 | Octave 3 | Octave 4 | Octave 5 | Octave 6 |
|---|---|---|---|---|---|
| C | |||||
| C# | |||||
| D | |||||
| D# | |||||
| E | |||||
| F | |||||
| F# | |||||
| G | |||||
| G# | |||||
| A | |||||
| A# | |||||
| B |
Frequencies in hertz, equal temperament. Middle C is C4 at 261.63Hz.
A frequency generator is a simple tool with a long list of jobs, from home audio to music, science and quick hearing checks.
Play low tones to check bass and high tones to check tweeters. A sweep reveals buzzing, rattles and the point where your speakers stop playing.
Hold a reference A while you tune a guitar, violin or piano by ear. Switch the tuning to 432Hz or 442Hz if your group uses it.
Raise the frequency slowly to find the highest tone you can hear. The top end often fades with age. Use the Hearing Test for a full check.
If your ears ring, you can find a tone close to the sound and tell an audiologist the frequency. It helps describe the sound, not treat it.
A slow, low sweep shakes loose panels, shelves and windows so you can find what buzzes.
Many people play a low tone at full phone volume to help shake water out of a wet speaker grille. Dry the phone first and do not use heat.
A 1kHz sine is the standard test tone for checking cables, mixers, amplifiers and recording levels.
Show pitch, octaves, beats and wave shapes in class, or make sand patterns on a vibrating plate.
Everything a frequency generator needs, from the exact pitch control to a file you can keep.
Switch between a single steady tone, a log or linear sweep, an on and off pulse, two tones that beat or split across your ears, and full chords built on any root note.
Save the sound you set up as a 44.1kHz stereo WAV file, from 5 to 60 seconds, for video, apps or audio software.
See the real wave shape while it plays.
Shows the nearest musical note and how far off it is.
Move by 1, 10 or 100Hz, a semitone or an octave.
Send the tone to one ear or speaker, or anywhere between.
Copy a link that opens the same pitch, wave and volume.
Space to play, arrows to change pitch, up and down for octaves.
Let the tone play for 10 seconds or up to 1 hour, then fade out on its own. Handy for long tests and background tones.
Every tone is made on your device. There is no upload, no recording and no account to create.
It is quick, free and exact, and it keeps everything on your device.
Go far below hearing for slow vibration tests, or up to 20kHz at the top.
Type frequencies to two decimal places for tuning and science work.
It runs in Chrome, Edge, Safari and Firefox on phone or computer.
Download clean tones up to a minute long, free.
A tone generator is safe at normal listening levels. These three habits keep your ears, your pets and your speakers comfortable.
Begin at a low volume and turn it up slowly. Pure tones can feel louder than music at the same setting.
Very high tones can be hard to hear and easy to play too loud. Keep them short and stop if your ears feel uncomfortable.
Dogs and cats hear high pitches that people cannot. Long, loud bass can also damage small laptop and phone speakers.
Clear answers about frequencies, waveforms, downloads and safety.
A tone generator plays a sound at an exact frequency. People use it to test speakers and headphones, tune instruments, check their hearing range, find rattles in a room, calibrate audio gear and teach how sound works.
Type the number of hertz into the large frequency box, or drag the slider, then press play. You can also press a preset or pick a musical note. The tone changes live while it plays.
In standard tuning A4 is 440Hz. Middle C, or C4, is about 261.63Hz. Some orchestras tune A4 to 442Hz, and some musicians prefer 432Hz, which you can choose in the tuning setting.
A sine wave is a single pure frequency with a smooth sound. Triangle adds soft harmonics, square adds strong odd harmonics for a hollow, buzzy sound, and sawtooth adds every harmonic for the brightest, sharpest sound.
Most people hear from about 20Hz to 20kHz. The upper limit often drops with age, so many adults hear up to about 15kHz to 17kHz. Very low tones under 20Hz are felt as vibration more than heard.
Yes. Set up your tone, choose a length from 5 to 60 seconds and press Download WAV. The file is a 44.1kHz, 16-bit stereo WAV that works in video editors, apps and audio software.
A sweep glides from one frequency to another over a set time. A log sweep spends the same time on every octave, which matches how we hear. It is useful for finding where speakers stop playing and where things rattle.
It plays a second tone a few hertz above the first. Mixed together, the two tones pulse at the difference, called beating. Split, each ear gets one tone, which is how binaural beats work on headphones.
Your speakers or headphones may not play that range, or the tone may be past your own hearing limit. Phone and laptop speakers rarely play below about 100Hz. Try headphones, and raise the volume slowly.
Yes, at a sensible volume. Start low and raise it slowly, keep high tones short, and stop if your ears ring or feel uncomfortable. Avoid long, loud tones on headphones.
Many people play a low tone around 165Hz at full phone volume to help shake water out of a wet speaker grille. It can help with small amounts of water, but it is not a fix for water damage.
Yes. It runs in any current browser on iPhone, iPad, Android, Windows, Mac and Chromebook. On iPhone, turn off silent mode or use headphones if you hear nothing.
Test speakers, headphones, your microphone and your hearing, all free and all in your browser.
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