Tone Generator
Play a sine, square, sawtooth or triangle tone at any frequency and download it as WAV. Your files are never uploaded to our servers. ToolkitPoint processes them on your own computer, so confidential documents stay with you.
How to use Tone Generator
- Type a frequency or drag the logarithmic slider (20 Hz to 20 kHz).
- Choose the waveform: sine, square, sawtooth or triangle.
- Set a low volume and press Play; change the frequency while it plays.
- Read the nearest musical note, such as A4 for 440 Hz.
- Set a duration and press "Download WAV" to save the tone.
Worked example
Set 440 Hz with a sine wave: the note reads A4 and the period 2.273 ms. Downloading a 3-second tone saves tone-440Hz-sine.wav, a 44.1 kHz mono file of about 265 KB.
When to use this tool
- Tuning an instrument or checking pitch by ear.
- Testing speakers, headphones or a hearing range.
Important limitations
Output device, speaker size and hearing range limit what you hear at very low and very high frequencies.
Frequently asked questions
What is the nearest musical note?
The tool converts the frequency to the closest note in standard tuning (A4 = 440 Hz) and shows how many cents sharp or flat it is, which helps when tuning instruments.
What does the WAV file contain?
A 44.1 kHz, 16-bit mono tone of the chosen length and waveform, with a 10-millisecond fade in and out so it does not click.
Why is the square wave louder?
Square and sawtooth waves contain many harmonics and more energy than a sine wave at the same volume setting. Start low when switching waveforms.
Can I hear 20 Hz or 20,000 Hz?
Maybe not. Small speakers rarely reproduce very low tones, and hearing above about 15-17 kHz fades with age.
Is it safe for my ears and speakers?
Keep the volume low, especially with headphones and at high frequencies, and avoid long exposure to loud tones.