Generate precise frequencies from 20 Hz to 20 kHz, choose a waveform, match musical notes, and play or download the tone in your browser.
Quick reference tones:
An online tone generator, also called an audio frequency generator, creates a continuous sound at an exact frequency measured in hertz. Use it to play a steady test tone, find a musical pitch, or create a reusable reference signal without installing software.
A sine wave produces the cleanest single-frequency reference. Square, sawtooth, and triangle waves add different harmonics, making them useful for synthesis, waveform comparison, and audio-system checks.
Move through the common audible range with a logarithmic slider, type a precise Hz value, or shift the tone by one octave.
Switch between sine, square, sawtooth, and triangle waves while the generator is playing.
See the nearest note and its cents offset as you adjust the frequency, including references such as A4 at 440 Hz.
Choose a duration, listen immediately, or download MP3, WAV, M4A, FLAC, OGG, or AAC without uploading a file.
Lower your device volume before playing a tone, especially when using headphones or checking very low and high frequencies.
Use the slider, enter an exact Hz value, select a quick preset, or use the octave controls to halve or double the frequency.
Select sine for a pure reference tone or use square, sawtooth, or triangle when you need additional harmonics.
Start near silent and increase the level only until the tone is clearly audible. Never compensate for an inaudible frequency with excessive volume.
Listen in the browser, or set a duration and export the current frequency, waveform, and volume in the audio format you need.
A precise frequency generator is useful for music practice, audio testing, education, and repeatable reference signals.
Generate A4 at 440 Hz, Middle C, guitar notes, or another exact pitch for tuning, ear training, and interval practice.
Play controlled frequencies while listening for rattles, dropouts, uneven response, or obvious playback problems.
Create steady tones for checking signal flow, setting relative levels, reviewing filters, or comparing playback systems.
Demonstrate pitch, octaves, waveforms, and harmonics, then download the signal for a DAW, editor, presentation, or repeatable test.
The selected waveform changes both the sound and its harmonic content.
| Waveform | Character | Typical use |
|---|---|---|
| Sine | Pure and smooth with no added harmonics | Frequency checks, tuning, and clean reference tones |
| Square | Bright and hollow with strong odd harmonics | Digital synthesis and harmonic demonstrations |
| Triangle | Softer with weaker odd harmonics | Gentle synthesis and waveform comparison |
| Sawtooth | Bright and dense with even and odd harmonics | Subtractive synthesis and filter checks |
A generated mathematical frequency is precise, but the sound reaching your ears still depends on the device, amplifier, speakers, headphones, and room.
Pure tones can become uncomfortable quickly, and inaudible frequencies can still drive headphones or speakers at a high level.
Lower the system volume before playback, raise it gradually, and keep high-frequency checks brief.
If you cannot hear a very low or high frequency, do not keep increasing the volume to compensate.
Phones, laptops, headphones, speakers, amplifiers, and rooms may attenuate or distort parts of the 20 Hz to 20 kHz range.
This generator provides reference tones, not a calibrated hearing assessment or diagnosis. Stop immediately if playback causes discomfort.
An online tone generator synthesizes a repeating waveform at a selected frequency measured in hertz and plays it through the browser.
For online audio tools, both terms usually describe the same core function: generating an audible waveform at an exact frequency.
Start with a sine wave because it provides the cleanest single-frequency reference. Other waveforms contain harmonics that change what the system is reproducing.
The tool covers 20 Hz to 20,000 Hz. Your playback hardware may not reproduce the lowest and highest parts of that range accurately.
Yes. Enter any of those values directly or select an available reference preset. The tool also shows the nearest musical note and cents offset.
Yes. Choose a duration and export the current frequency, waveform, and volume as MP3, WAV, M4A, FLAC, OGG, or AAC.
It can play reference frequencies for informal comparison, but it is not calibrated and cannot diagnose hearing loss. Hardware response and listening volume can change the result.
The requested tone may be correct while the browser, sound card, amplifier, speaker, or headphones introduce distortion, aliasing, or mechanical noise.
Yes, although phone and tablet speakers often cannot reproduce very low and very high frequencies accurately. Use low volume and suitable headphones when needed.
Build 16- or 32-step patterns with classic kits, BPM, swing, effects, and audio export.
Finger drum on 16 pads, record custom sounds and performances, then export the result.
Create glitch, drone, and pad-like versions with grain controls.
Set BPM, meter, subdivisions, beat accents, click sound, tempo training, and practice time.
Choose an exact frequency, waveform, volume, and duration, then play or download the tone in a mainstream audio format.
Browse 80 CC0 and browser-generated sounds, then upload, record, trim, and save custom clips to a personal soundboard.
Play audio through an analyzer and switch visual themes.
