Tone plays a clean, steady sound at any frequency — handy for testing speakers and headphones, checking your hearing range, finding a buzz, or tuning by ear. Pick a waveform and volume, then play. Start the volume low. Nothing is uploaded.

440 Hz

Waveform

Volume · 30%

The tone is generated with the Web Audio API entirely on your device. High volumes and high frequencies can damage hearing and equipment — begin quietly and increase gradually, and keep exposure short. Most adults hear roughly 20 Hz to 15–17 kHz; hearing rolls off with age. Everything runs on your device.