Free Online Guitar Tuner – Tune Guitar, Bass, Ukulele & Violin with Microphone

Online Guitar Tuner

Tune your guitar, bass, ukulele, violin or any instrument with your microphone · Chromatic tuner · Reference tones · 100% free

Instrument and tuning Guitar – Standard (E A D G B E) Guitar – Drop D (D A D G B E) Guitar – Half step down (Eb) Guitar – Open G (D G D G B D) Guitar – DADGAD Bass – 4 string (E A D G) Ukulele – Standard (G C E A) Violin (G D A E) Cello (C G D A) Chromatic (any instrument or voice)

Calibration: A4 frequency (Hz)

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Press "Start Tuner" and play a string

-50-250 cents+25+50

Tap a string to hear its reference tone

• Play one string at a time and let it ring. The tuner finds the nearest string automatically.
• Green means in tune (within 5 cents). If the hint says "Tune up", tighten the string; "Tune down", loosen it.
• Use a quiet room and hold your phone or laptop close to the instrument.
• Standard pitch is A4 = 440 Hz. Change it only if you play with a band or recording tuned differently (for example 432 Hz).

The tuner listens through your microphone inside your browser. No audio is recorded or uploaded.