GuitarTunePro by guitartunepro offers a free online chromatic guitar tuner that works directly in your web browser. Built for everyone—from first-time beginners to touring professionals—it uses your device microphone with the Web Audio API, so you can tune without any app downloads, subscriptions, or setup hassle. Automatic string detection helps you tune each string quickly, while chromatic precision and measured accuracy data make it reliable in real use. Choose Standard, Drop D, Open G, Half-Step Down, DADGAD, and more through 10+ tuning presets, with support for guitar, bass, ukulele, and multi-string setups.
Quick chromatic tuning in your browser
Visit GuitarTunePro and start tuning instantly with your microphone today.
Straighten your sound and play with confidence.