What the tool does, how to run it, and what to expect from the result.
Tune in a quiet room. Press "Start tuning", allow microphone access, then play any note and let it ring. The big note display shows the closest pitch; the bar below it shows how far off you are. Green means within 5 cents, amber within 15 cents, red further off. Standard tuning: equal temperament, A4 = 440 Hz.
A quick way to understand who this helps, what it solves, and where it connects next.
Guitarists, piano or keyboard players, and anyone who needs a quick, free tuner without installing an app.
Tuning a piano or keyboard to standard pitch (A4 = 440 Hz) before a practice session or recording.
Short answers for the questions people usually have before trying a utility like this.
Yes. It is completely free, with no sign-up, no app install, and no usage limits.
No. The microphone signal is analyzed locally in your browser tab and is never recorded, saved, or sent anywhere.
Standard concert pitch, A4 = 440 Hz.
It identifies the pitch of a note you play, which tells you how far a string is from equal temperament. Actually adjusting piano string tension is a specialist, hands-on job; this tool is for checking pitch, not for do-it-yourself piano tuning.
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Play a note and the nearest pitch is identified live from your microphone. Reference pitch A4 = 440 Hz. Nothing is recorded, nothing leaves your device.
Waiting for a clear, sustained note.