Being in tune is the first step to sounding good, and it is the step most beginners skip. This tuner listens to your guitar through the microphone on your phone or laptop and shows, string by string, how far each note is from where it should be. It measures in cents, a hundredth of a semitone, so you can get each string exactly right rather than nearly right.
Choose a needle, a strobe, or both. The needle is quick to read; the strobe is the most precise display there is: its stripes drift right when the string is sharp, left when it is flat, and stand still when it is perfectly in tune, so even a fraction of a cent shows as slow movement.
The browser’s voice features (echo cancelling, noise removal and automatic volume) are switched off while the tuner listens, because they bend the sound of an instrument. Instead, a noise filter keeps out hum and room chatter, and five sensitivity levels let you choose between a noisy room and a soft fingerpicked note.
Tap any string chip to hear that note on a real guitar sound and tune by ear. Pick a tuning to match the song (standard, drop D, half-step down, open G, DADGAD and 40 more), set a capo, or change the reference pitch from 440 Hz in Advanced.