🔊 Sound is generated in the browser. Mic audio is never uploaded.
440Hz
Frequency440Hz
Waveform
Output channel
Volume20%
Volume is capped at 60%. A pure sine tone is far harder on the ears than music, and loud high frequencies over a long stretch can damage your hearing. Turn it up only until you can hear it.
What this tool does
- 20Hz to 20kHz slider
- Sine, square, triangle and sawtooth
- Choose left or right channel
- Guidance on safe volume
Other sound tools
Start at a low volume — high frequencies and loud tones can damage your hearing.