Online Tone Generator
Free, Simple and Easy to Use Online Tone Generator
Simply enter your desired frequency (20Hz to 20,000Hz) and press play. You'll hear a pure tone sampled at professional 44.1kHz quality. The tone will continue until you press stop, making it perfect for extended audio tests or experiments.
Our tone generator offers four different waveform options: Sine (smooth pure tone), Square (rich harmonics), Sawtooth (bright, sharp sound), and Triangle (mellow alternative to sine). Click the waveform buttons to select your preferred sound character.
Important Safety Notice: Always ensure headphones or speakers are at low volume before playing tones to prevent hearing damage or equipment harm. High frequencies at loud volumes can be particularly dangerous.
Browser Compatibility
Our Online Tone Generator works flawlessly with Chrome, Firefox, Safari and Edge. If you don't hear sound:
- Update your browser to the latest version
- Check your volume settings and mute switches
- Try our downloadable WAV option as a universal fallback
Pro Tips for Using the Generator
Keyboard Shortcuts: Click the frequency box then use:
- Up/Down arrows: Adjust by 1Hz increments
- Shift + Up/Down: Adjust by 10Hz increments
- Great for precise tuning or hearing tests
Share Custom Tones Easily
Create shareable links for specific frequencies and waveforms:
- Single frequency: /?freq=432 (432Hz example)
- Waveform only: /?waveform=square
- Combined: /?freq=500&waveform=square
Common Frequency Uses
Popular frequencies for different applications:
- 440Hz: Standard musical pitch (A above middle C)
- 432Hz: Alternative tuning favored by some musicians
- 1,000Hz: Common reference tone for audio equipment testing
- 17.4Hz: Low frequency for subwoofer testing
- 8,000-20,000Hz: High frequency hearing range tests