Free Online Tone Generator & Frequency Generator
Generate precise audio frequencies with our free online tone generator. This frequency generator lets you create custom sound waves for instrument tuning, hearing tests, and audio experiments.
Features of a Tone Generator
Precise Control
Generate pure tones with 1Hz precision across the entire audible spectrum (20Hz to 20,000Hz).
4 Waveforms
Switch between Sine, Square, Sawtooth, and Triangle waves to test different audio characteristics.
Zero Latency
Fast, lightweight, and runs entirely in your browser using the professional Web Audio API.
High Fidelity
Experience pure, distortion-free signal generation with industrial-grade accuracy.
Mobile Ready
Fully responsive design allows you to test audio systems from any smartphone or tablet.
Hearing Safety
Built-in protection with low-volume starts and safety warnings for high frequencies.
How to Use the Frequency Generator
1. Select Wave
Choose your timber: Sine is pure, Square is buzzy.
2. Set Hz
Use the slider or type to select any frequency.
3. Adjust Vol
Start low to protect your hearing and equipment.
4. Get Sound
Hit Play to start your precise audio frequency.
Frequently Asked Questions
Everything you need to know about audio tone generation.
An online tone generator is a digital tool that uses your browser's Web Audio API to create electronic signals at specific frequencies. It's used by musicians, sound engineers, and scientists for tuning, testing, and various audio experiments.
Yes! Use the 440Hz preset for standard concert pitch or 432Hz for alternative tuning. The pure sine wave is perfect for a clear reference pitch.
Sine waves are pure and smooth. Square waves have a buzzy, digital sound. Sawtooth waves are very bright and rich in harmonics (common in synthesizers). Triangle waves are a mellow middle ground.
Always start at low volumes. High frequencies (above 10kHz) can be uncomfortable or even damaging to hearing and speakers if played too loudly.
Hearing Safety Warning
Start with your speaker or headphone volume set to low. Pure tones, particularly high-frequency ones, can be damaging at high sound pressure levels.