Free Online Tone Generator | Exact Frequency Sound Maker | WebToolsPro

Frequency Tone Generator

Generate exact audio frequencies to test your speakers, tune instruments, or find your hearing limits.

Caution: Start with low volume! High frequencies (above 10,000 Hz) or Square waves can be painful and may damage your hearing or speakers if played too loud.

Hz
Ready
Frequency Slider 440 Hz
Master Volume 50%
Waveform:
Balance:
Quick Presets

How To Use

Set Frequency: Type an exact number in the box or drag the slider. Human hearing ranges from 20 Hz (deep bass) to 20,000 Hz (high pitch).
Choose Waveform: 'Sine' is the smoothest and safest sound. 'Square' and 'Sawtooth' are much harsher and louder.
Test Speakers: Use the Balance dropdown to play the sound only in the Left or Right speaker to ensure your audio setup is working.

Why Use This Tool?

Hearing Tests: Find out the highest frequency you can hear. As we age, our ability to hear high frequencies (above 14kHz) naturally decreases.
Instrument Tuning: The standard musical pitch is A4, which is exactly 440 Hz. Play it here to tune your guitar or violin by ear.
Water Ejection: Dropped your phone in water? Playing a low-frequency tone (like 165 Hz) at max volume can help vibrate water out of the speakers.

Frequently Asked Questions

Is this tool safe for my ears and speakers?

Yes, but you must be careful with the volume. Always start at a very low volume (around 10%). Frequencies above 10,000 Hz or below 40 Hz can be damaging to tweeters or subwoofers if played at maximum volume.

What is the difference between Sine and Square waves?

A Sine wave is the purest tone, containing only a single frequency (very smooth to the ear). A Square wave contains the main frequency plus many odd harmonics, making it sound very harsh, buzzy, and mathematically louder.

Why can't I hear anything above 15,000 Hz?

Human hearing ranges from 20 Hz to 20,000 Hz. However, presbycusis (age-related hearing loss) naturally reduces our ability to hear high pitches. Most adults over 30 cannot hear sounds above 15,000 Hz or 16,000 Hz. Also, many basic laptop speakers physically cannot produce sounds above 15kHz.