Tuner
An accurate tuner right in your browser — allow the microphone and play. Guitar, ukulele or any pitch (chromatic), and an all-strings mode: strum once and instantly see which string drifts.
How the tuner works
The tuner works on phones and desktops with nothing to install — it listens through the microphone and measures pitch to better than one cent. The needle is quickest for everyday tuning and the all-strings mode checks the whole guitar with a single strum.
Supports standard E A D G B E, drop D, half step down, DADGAD and ukulele G C E A tunings, concert-A calibration (430–450 Hz) and a reference tone for tuning by ear.