Guitar Tuner

A mic-based chromatic tuner that shows the nearest note and cent deviation in real time. Guitar, ukulele and bass.

A free chromatic tuner that uses your mic. Play a string and it shows the nearest note and how many cents you're off, with a needle that turns green when you're in tune. Works for guitar, ukulele and bass.

Guitar (EADGBE)

🔒 Your mic is processed live on your device — nothing is recorded, stored or sent to a server.

Allow mic access, then play a note near your mic.

About This Content

A free chromatic tuner that detects your mic input and shows the nearest note name with cent deviation (±50) in real time. Choose standard guitar tuning (EADGBE), ukulele (GCEA) or bass (EADG) presets, or use chromatic mode. The needle turns green when you're perfectly in tune. Your mic is processed entirely on your device and is never recorded, stored or sent to a server. No install — tune right in your browser.