Precise controls
Enter a frequency from 20 Hz to 20 kHz or jump to a useful preset.
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Tone Generator
Enter a frequency, choose a waveform and play a precise audio tone directly in your browser for speaker checks, pitch comparison and sound experiments.
Frequency440 Hz
Output is capped at 25%. Your device volume still applies.
Ready. Start with a low device volume.
Oscillator
This tool runs locally in your browser. Your input is not uploaded to WebTaskKit.
Simple by design
How to use Tone generator
- 1
Lower both the tool and device volume before starting, especially if headphones are connected.
- 2
Set a frequency from 20 Hz to 20 kHz and choose the waveform you need.
- 3
Play the tone briefly, make one controlled change at a time, and stop immediately if it feels uncomfortable.
Four waveforms
Compare sine, square, triangle and sawtooth waves through the browser audio engine.
Click-free playback
Gentle gain ramps reduce abrupt clicks when starting and stopping.
Put it to work
Practical ways to use Tone generator
Compare a musical pitch
Start with the 440 Hz A preset and a low-volume sine wave, then compare it with an instrument or another reference source.
Trace a playback problem
Try a few separated frequencies at the same low level to check whether a buzz or dropout appears in a particular region.
Learn how waveforms differ
Hold frequency and volume constant while switching between sine, triangle, square and sawtooth to hear the effect of added harmonics.
Choose deliberately
Make the right output
Use sine for a clean reference
A sine wave contains one fundamental frequency and is the clearest starting point for pitch comparisons and informal response checks.
Use complex waves for timbre experiments
Triangle, square and sawtooth waves add harmonics, so they sound brighter and may expose different resonances.
Use measurement gear for calibration
The browser is suitable for quick comparisons. Calibrating levels, hearing thresholds or laboratory equipment requires a known signal chain and proper instruments.
Continue the workflow
Useful next steps
Record test observationsKeep a plain-text log of the device, frequency, waveform, level and result for repeatable comparisons.Make a test checklistTurn a finalized speaker-check procedure or observation log into a shareable PDF.Share the test pageCreate a QR code for this tool when a technician needs to open it on another device.
Good to know
Frequently asked questions
What do Hz and kHz measure?
Hertz measures cycles per second. One kilohertz equals 1,000 hertz.
Why can I not hear some frequencies?
Hearing range varies by person, while speakers, headphones and the rest of the playback chain also have reproduction limits.
Can this calibrate equipment?
It is useful for informal checks, but browser and hardware output are not a substitute for calibrated signal sources and measurement equipment.
How can I use tones safely?
Start at a very low volume, listen briefly, avoid headphones when possible, keep children and pets away from the test, and stop immediately if you feel discomfort.