All tools
Tone generator
Play a tone at any frequency, sweeps and up to three tones at once, left or right, and check the highest tone you can hear. Free, with no account or uploads.
What do you want to play?
A steady toneBest for mostAny frequencyA sine, square, triangle or saw wave at the frequency you set, up to three at once.A sweepFrom one pitch to anotherA tone that glides from one frequency to another, to test speakers or a room.Check what I can hearHighest toneA tone rises until you can no longer hear it; not a hearing test.
Turn your device's volume down before you start, then up slowly.
Common frequencies
100 Hz440 Hz1 kHz10 kHz
Play in
Both earsLeftRight
Wave shape
SineSquareTriangleSaw
Tones are made by your browser; nothing is downloaded, sent or kept. High and loud tones can harm hearing and speakers: start quiet.
A little help along the way
Turn your volume down first. Every option is explained underneath.
- Say what you want to playA steady tone, a sweep, or the highest tone you hear.
- Set the frequencyWith the stepper or a chip, from 1 Hz to 22 kHz.
- Press PlayStart quiet and turn up slowly.
Every option explained
- Wave shape
- Sine is pure; square, triangle and saw are brighter and played more quietly.
- Play in
- Both ears, the left or the right.
- Sweep
- By octaves (the usual way) or in a straight line.