Online Instrument Tuner & Pitch Reference Generator (Guitar, Ukulele, Bass, Violin)

Professional real-time microphone pitch tuner using Web Audio autocorrelation algorithms. Detects exact note names (A0 to C8), frequency (Hz), and cents offset on an analog needle gauge. Includes reference tone generator and instrument presets (Guitar, Bass, Ukulele, Violin).

1. Step 1: Grant microphone permission to enable live pitch detection.
2. Step 2: Select your instrument preset (Standard EADGBE Guitar, Drop D, 4-String Bass, Ukulele, Violin).
3. Step 3: Pluck a string near your microphone and watch the needle gauge adjust in real-time.
4. Step 4: Tune your string until the needle centers on 0 cents in the GREEN target zone.
5. Step 5: Alternatively, click any note button in the Reference Tone Generator to tune by ear.

How accurate is this online tuner?

Our tuner uses browser-level 44.1kHz audio sampling with YIN autocorrelation algorithm, providing sub-cent (+/- 1 cent) pitch accuracy rivaling dedicated clip-on chromatic tuners.

Why does it ask for microphone permission?

The browser requires microphone access solely to process sound waves from your instrument in real-time. Audio is analyzed strictly on your device and is never recorded or stored.

What is A4 = 440Hz vs 432Hz?

440Hz is the modern international tuning standard. 432Hz (Verdi tuning) is a popular alternative tuning believed by many musicians to sound warmer and more harmonious.