Free Online Tone Generators & Audio Tests

Online tone generator, noise generators, a metronome, a tuner, hearing and speaker tests, and audio effects. 26 free audio tools that run in your browser.

Everything runs in your browser. No audio is ever uploaded.

ToneToolkit is a set of 26 audio tools that run entirely in your browser. Generate a tone at any frequency between 20 Hz and 20 kHz, play white, pink or brown noise, sweep a room for rattles, test speakers, headphones, a surround setup or a microphone, check your own hearing, keep time with a metronome, tune an instrument, or change the volume, pitch or speed of a file you already have. Nothing needs an account and nothing needs an install. The privacy claim is one you can check for yourself: load a page, disconnect your network, and every tool keeps working, because the audio is generated and processed by the Web Audio API on your own device and never leaves it.

Most used tools

Online Tone Generator Free Online Metronome Microphone Test Online Tuner White Noise Generator Online Hearing Test Speaker Test Volume Adjuster

Generators

Online Tone Generator

Play a pure tone at any frequency with a choice of waveforms.

Dual Tone Generator

Play two tones at once for binaural beats or interval tests.

Multi Tone Generator

Stack several tones into a chord or custom spectrum.

White Noise Generator

Generate white, pink and brown noise for focus or sleep.

Colored Noise Generator

Explore blue, violet and gray noise across the spectrum.

Frequency Sweep Generator

Glide a tone across a frequency range and export it.

Mosquito Tone

Play high tones from 8 kHz to 19 kHz that only some ears hear.

DTMF Generator

Play touch-tone keypad sounds and dial a sequence.

Tests

Speaker Test

Check your left and right speakers and stereo balance.

Headphone Test

Check left and right, polarity, range and stereo image.

Surround Sound Test

Play a tone on one 5.1 or 7.1 channel at a time.

Microphone Test

Check that your microphone works and see its live level.

Online Hearing Test

Find the highest frequency you can still hear.

Subwoofer Test

Sweep low frequencies to test a subwoofer or bass.

Water Eject

Shake water out of a phone speaker with a 165 Hz tone.

Hearing Age Test

Find the highest tone you hear and its typical age band.

Spectrum Analyzer

See live frequency bars and a spectrogram of your microphone input.

Decibel Meter

Estimate how loud a room is, with your own calibration offset.

Tinnitus Frequency Matcher

Find the pitch that matches the ringing you hear.

Tools

Free Online Metronome

Keep time with an adjustable, accented click.

Online Tuner

Tune any instrument with your microphone.

Voice Recorder

Record your voice, play it back and download the file.

Audio Calculators

Convert notes to hertz, tempo to milliseconds and gain to decibels.

Effects

Volume Adjuster

Normalize or change the loudness of an audio file.

Pitch Shifter

Shift the pitch of an audio file without changing its speed.

Time Stretcher

Speed up or slow down audio without changing its pitch.

Frequently asked questions

Is my audio uploaded anywhere?

No. Every generator and effect runs locally in your browser with the Web Audio API. Nothing is sent to a server.

Which browsers are supported?

Any modern browser with Web Audio support, including recent Chrome, Edge, Firefox and Safari. Some tools also need microphone access.

Why do I have to press play first?

Browsers only allow sound to start after you interact with the page, so your first tap on Play also unlocks audio playback.

Local history

Pinned and recently used tools are stored only in this browser. You can clear them anytime.