Index · 20 pages

Sitemap

Every page on soundgenerator.app, grouped by what it does. Start with the tone generator if you just want a tone, or work down the list. Nothing here is hidden behind an account, and each tool runs in your browser.

Start here The main generator

Online Tone Generator

Pure sine, square, sawtooth and triangle tones from 1 Hz to 20 kHz, with precise frequency entry and WAV export.

Tools Generators

Multiple Tone Generator

Run up to eight independent oscillators with per-voice frequency, waveform, level and stereo pan.

Frequency Sweep Generator

Linear or logarithmic sweeps between any two frequencies, with start/end levels and optional hold.

Noise Generator

White, pink and brown noise with band shaping - for masking, calibrating and testing.

Alarm Generator

Beeps, double beeps, sirens, warble tones and pulse trains at any tempo - or continuous.

Tools Music & tuning

Binaural Beat Generator

Two detuned carriers, one per ear. Delta through gamma with exact beat frequencies.

Instrument Tuning Tones

Reference pitches for guitar, bass, ukulele, violin, cello, mandolin, banjo and viola.

Online Metronome

Accurate metronome from 20 to 300 BPM with time signatures, accents and tap tempo.

432 Hz Frequency Generator

Play and compare 432 Hz against 440, 435 and 415 Hz reference pitch - by note or by hertz.

Tools Hearing & speakers

Online Hearing Test

Step through audiometric frequencies from 125 Hz to 20 kHz and log what you can hear.

Subwoofer Test Tones

Low-frequency test signals from 16 Hz up, plus sweep tools for finding room and driver limits.

Tools Signals & telecom

DTMF Signal Generator

The full telephone keypad, A–D columns, dial tones, busy tones and SIT patterns.

The Pips Time Signal

The six 1000 Hz BBC-style pips, with an optional countdown to the next hour.

Tools Voice & files

Voice Generator

Type anything and hear it spoken by the voices installed on your device - free and offline.

Voice Recorder

Record from your microphone, watch the live waveform and download the take as a WAV file.

Pitch Shifter

Shift any audio file by semitones, with or without tempo correction, then export the result.

Time Stretcher

Change the tempo of a recording without changing its pitch - slow it down to practise.

Reference How it works and the small print

Acoustic Theory

The maths behind the tones: sine waves, harmonics, decibels, wavelengths and sample rates.

About Sound Generator

What this site is, how it works, and how to use it without damaging your hearing.

Everything runs in your browser: no accounts, no uploads, no audio leaves your device.

16 tool pages plus 3 reference pages. Last built 2026. Set as one line: tones and sweeps are generated by the Web Audio API, downloads are rendered in your browser as 16-bit WAV files, and no audio you play or record is uploaded anywhere.