Online Tone Generator

Free browser-based utility to generate pure sine, square, triangle, and sawtooth audio tones

Submitted byHEhello

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RatingNo reviews yet

Reviews—

PricingFree

APINone

PlatformsWeb, iOS

AddedNov 2026

Overview

An online tone generator that produces pure audio tones from 20 Hz to 20,000 Hz in real time. It operates entirely within the web browser using the Web Audio API, meaning it requires no downloads, installations, or user accounts, and can even work offline after loading. Users can generate sine, square, triangle, and sawtooth waveforms, perform frequency sweeps, execute left/right speaker balance tests, and use a community-inspired 165Hz water eject sound to help clear phone speaker grilles.

Key features

9 highlights

Generate pure tones from 20Hz to 20,000Hz

Supports sine, square, triangle, and sawtooth waveforms

Synthesizes audio locally in real time using the Web Audio API

Frequency sweep generator tool for continuous low-to-high checks

Speaker test tone generator with left, right, and center balance controls

Water eject tool playing a 165Hz tone to help move trapped water from speaker grilles

Download generated tones as a 5-second WAV file

Share custom frequencies and waveforms via unique copied links

Works offline after the page has initially loaded

Pricing

Pricing not confirmed

We haven't verified a structured pricing table from the vendor's website. Check the tool's official pricing page for the latest.

Pros

Completely free to use with no account, sign-up, or registration required.
Requires no installation or download, running entirely in the web browser.
Runs locally on your device via the Web Audio API, keeping it functional offline after loading.
Allows users to save the generated tone as a five-second WAV audio file.
Enables sharing exact configurations through a copied custom URL link.
Offers multiple wave types including sine, square, triangle, and sawtooth waveforms.
Includes dedicated tools for frequency sweeps and left/right speaker panning tests.
Features a community-inspired 165Hz water eject tool designed to help clear speaker grilles.

Cons

No public API or developer integration documentation is provided on the site.
Saved WAV audio files are limited to a fixed duration of five seconds.
Browser security requires a manual user click to start sound playback.
The water eject tool does not guarantee safety, physical speaker repair, or effectiveness.
The utility cannot dry water inside the device or inside the charging connector.