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    Tune any instrument in real time with your microphone: guitar, bass, ukulele, violin, cello, winds or voice. Accurate, free, no install.

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    Enable the microphone to start
    -50♭0♯+50
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    440 Hz
    Plays a sustained note to tune by ear or hold the pitch. With a tuning selected, click a string above to hear it.
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    How to tune your instrument

    Tuning well is the first step to making everything sound good. Enable the microphone, choose your instrument (or chromatic mode) and play one string or note at a time, clearly and sustained. The tuner detects the pitch and shows you the nearest note with a needle: center it until it turns green (within ±5 cents). For string instruments, adjust the pegs little by little; if you are very flat, raise slowly until you approach the target note. Tune in a quiet place for better accuracy. With a standard tuning selected you will see your instrument\'s strings highlighted as you tune them.

    Frequently asked questions

    How do I use the online tuner?

    Press "Enable microphone" and allow access when the browser asks. Play a note on your instrument and the tuner shows the detected note and a needle: if it is centered and green, you are in tune; to the left you are flat (♭) and to the right sharp (♯). Adjust until it is centered.

    What instruments can I tune?

    Any: guitar, bass, ukulele, violin, viola, cello, and also wind instruments or your voice. Pick a standard tuning (guitar EADGBE, bass, ukulele, violin, cello) or the chromatic mode, which detects any note with no reference.

    Do I need a microphone?

    Yes. The tuner listens to your instrument through the device microphone, so you must allow microphone access in the browser. Nothing is recorded or sent: all the analysis happens on your own device, in real time.

    What are "cents"?

    They are the fine unit of tuning: 100 cents is one semitone. The needle shows how many cents you are above or below the note. You are considered in tune within ±5 cents (the needle turns green in the center).

    Is it accurate?

    Yes. It uses real-time autocorrelation pitch detection, a reliable method for standard tuning of string, wind and vocal instruments. For best results, tune in a quiet place and play a single clear, sustained note.

    Is it free and does it work on mobile?

    Yes, completely free, no sign-up, and it works on PC, tablet and mobile right in the browser. It requires a secure connection (HTTPS) and microphone permission, which you already have on this page.

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