Recently I built a small browser-based audio tool called TonePanel:
It is an online tone generator that lets you play steady tones from 20 Hz to 20 kHz directly in the browser. You can switch between common waveforms like sine, square, sawtooth, and triangle, without installing anything.
The idea was simple: I wanted a clean tool for quick audio checks — something useful for testing speakers, headphones, frequency response, or just understanding how different Hz ranges sound.
Why I made it
A lot of tone generator tools work, but many of them feel either too old, too cluttered, or too technical for casual users.
So I wanted to make something that feels more like a small control panel:
choose a frequency
press play
adjust the sound
switch waveform
stop when done
No account, no setup, no download.
What it can be used for
TonePanel can be useful for:
speaker testing
headphone checks
comparing low / mid / high frequencies
basic audio experiments
instrument reference tones
learning what different waveforms sound like
For example, a sine wave is usually the best starting point if you want to hear one clean frequency. Square, sawtooth, and triangle waves sound more “textured” because they contain additional harmonics.
Built for the browser
The tool runs locally in the browser, which makes it lightweight and easy to use. You just open the page and play a tone.
I’m also planning to expand it with more focused pages, such as:
Frequency Generator
Hz Generator
speaker test tools
sweep tone tools
simple educational guides about sound frequencies
A small safety note
Always start with low volume, especially when using headphones. High or very low frequencies can feel uncomfortable quickly.
Try it
Here is the tool:
Would love to hear feedback from anyone who works with audio, music, speakers, headphones, or browser-based tools.
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