Tone GeneratorTone Generator

Free Online Tool

Generate Any Frequency in Seconds

Test headphones, tune instruments, match tinnitus tones — all in your browser. No download. No signup. Completely free.

Start Testing — FreeSee How It Works

No signup required · Works on mobile · 100% free

440
Hz
1 Hz10 kHz20 kHz
Hz
Volume50%
Space: Play/Stop • ← →: Adjust frequency

How It Works

Three Steps to Any Tone

01

Set Your Frequency

Drag the slider or type any value from 1Hz to 20,000Hz.

02

Pick Your Waves

Choose sine, square, triangle, or sawtooth — whatever your test needs.

03

Hit Play

Hear the tone instantly. Adjust volume anytime. Share settings via URL.

Use Cases

What Will You Test?

Headphone Testing

Test Your New Headphones

Before: You bought headphones online. They sound off, but you can't tell if it's the bass, mids, or highs.

After: You run a quick frequency sweep from 20Hz to 20kHz. You find the dead spot at 4kHz. Return window still open.

Tone Generator plays any frequency instantly. You hear exactly what your headphones reproduce — and what they don't.

Hearing Care

Describe Tinnitus to Your Doctor

Before: Your doctor asks, "What pitch is your ringing?" You shrug. You can't describe a sound.

After: You dial up frequencies until one matches your ringing. You note the exact Hz. Your doctor now knows what to test.

Precise 1Hz-step control lets you zero in on any tone. No guessing. No medical jargon needed.

Note: This is not a medical device. Use it to prepare for your appointment, not to self-diagnose.

Music & Audio

Tune Instruments Without Gear

Before: Your guitar sounds off, but you don't own a tuner. You download an app, create an account, get hit with ads.

After: You open Tone Generator, set A4 = 440Hz, play the tone, tune your string. Done in 30 seconds.

A4, E, B, and common tuning frequencies are one click away. No account. No ads. Just the tone you need.

Features

Built for Precision

Full 1Hz–20kHz Range

Generate any frequency from 1Hz to 20,000Hz with precise digital input or smooth slider control. Competitors limit you to preset steps — we don't.

1Hz
20kHz
20Hz1kHz10kHz

Mobile-First Design

Full functionality on phone, tablet, and desktop with touch-optimized controls. Test your new earbuds on the bus. No laptop needed.

URL Sharing

Every setting is encoded in the URL — frequency, waveform, volume. Send a 440Hz sine wave link to a student. Bookmark your tinnitus match.

Pricing

Simple, Transparent Pricing

Free

$0/ forever

Casual testing, headphone checks, quick frequency lookups

  • All frequency generation (1Hz–20kHz)
  • 4 waveforms: sine, square, triangle, sawtooth
  • Real-time visualization
  • URL sharing
  • Mobile support
Most Popular

Pro

$4.99/ month

Regular testers, audio professionals, students who need export

  • Everything in Free
  • No ads
  • Advanced waveforms (pulse, noise)
  • Export audio as WAV
  • Frequency sweep mode
  • Save custom presets

Lifetime

$29.99one-time

Power users who want permanent access

  • Everything in Pro
  • Lifetime updates
  • No recurring payments

Cancel anytime via Creem Customer Portal · 14-day unconditional refund

FAQ

Common Questions

Is it really free?
Yes. The core tone generator is completely free — all waveforms, full frequency range, visualization, and mobile support. No signup needed. Pro adds advanced features for power users.
Do I need to create an account?
No. The free tool works instantly in your browser. We don't collect your email or personal data for basic use.
How accurate are the frequencies?
Frequencies are generated digitally via the Web Audio API with sample-accurate timing. For most testing purposes — headphones, speakers, instrument tuning — the precision is more than sufficient. This is not a calibrated laboratory instrument.
Can I use this for medical diagnosis?
No. Tone Generator is not a medical device. It can help you identify a tinnitus frequency to discuss with your doctor, but it cannot diagnose hearing loss or any medical condition. Always consult a healthcare professional.
Is my audio data stored?
No. All audio generation happens locally in your browser. We never upload, store, or process your audio. Your settings are optionally saved in your browser's localStorage only.
What happens if I cancel Pro?
You can cancel anytime through the Creem Customer Portal. You'll keep Pro access until the end of your billing period, then revert to the free version. Your presets won't be accessible until you resubscribe.
How is this different from onlinetonegenerator.com?
Three things: cleaner design (no cluttered interface), better mobile experience, and no intrusive ads. We focus on doing one thing well — generating precise tones instantly.
Can I export the audio?
WAV export is available in Pro. Free users can record their browser output using system tools or upgrade to Pro for one-click export.

You already know what frequency you need to hear.

The hard part is finding a tool that works instantly, doesn't bombard you with ads, and runs on your phone.

Start Testing — Free

No signup · No download · Works on any device