Guitar Tuner
Mic-based pitch detection or reference tones for tuning by ear. Works with guitar, bass, and ukulele. Nine tuning presets including standard, drop D, DADGAD, and open G.
Press Start Tuning to use your microphone, or play a reference tone below.
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Your browser blocked microphone access. Check your browser settings, or use the reference tones below to tune by ear.
Reference Tones
How to Use This Guitar Tuner
Click "Start Tuning" and allow mic access. Pluck one string at a time. The tuner identifies the pitch and shows whether you are sharp or flat. Turn the tuning peg until the needle centers and the display goes green. A quiet room helps the mic lock on faster.
About Guitar Tuning
Standard guitar tuning is E-A-D-G-B-E, low to high. Most players start and stay there, but alternate tunings open up some interesting territory. Drop D lowers the bottom string one whole step for heavier riffs. DADGAD has that open, droning quality. Open G is what a lot of slide players use. There are nine presets here covering guitar, bass, and ukulele.
Frequently Asked Questions
How does an online guitar tuner work?
It uses the Web Audio API to capture audio from your mic, then runs autocorrelation to figure out the pitch. Compares that frequency against known note frequencies and shows how far off you are. The math is doing the heavy lifting; all you see is the needle.
What is standard guitar tuning?
E-A-D-G-B-E, low to high. The frequencies are 82.41 Hz, 110 Hz, 146.83 Hz, 196 Hz, 246.94 Hz, and 329.63 Hz. You do not need to memorize those numbers. That is what the tuner is for.
How accurate is this tuner?
In a quiet room, 1-2 cents. That's comparable to a decent clip-on tuner. The green zone means you are within 5 cents of target, which is close enough that most ears cannot tell the difference.
Can I tune without a microphone?
Yes. Use the reference tone buttons below the tuner display. They play a clean sine wave at the correct pitch for each string. Match it by ear. Old school, but it works and it trains your ear at the same time.