Tuner

Tune your guitar by ear with your microphone, free.

A chromatic guitar tuner that runs in your browser — no install, no upload. Pluck a string and watch the cents dial.

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-50¢0+50¢

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Reference

Standard Tuning

Tune your guitar using your microphone.

How to use

Click Start Tuner and allow microphone access when prompted.
Pluck one open string at a time, letting it ring out cleanly.
The big letter shows the nearest pitch; the dial shows how many cents you are sharp (+) or flat (−).
Aim for the indicator inside the green band (±5 cents).
Need a non-standard pitch? Pick 432, 440, 441, or 443 Hz from the Reference row.

Tune away from loud sources — air conditioners, background music, and other instruments add competing fundamentals that confuse pitch detection.
New strings drift. Re-tune after the first few minutes of play, and again whenever the room temperature changes.
Standard tuning is E A D G B E (low to high). The pegs at the bottom highlight the string you are aiming at.

Audio is processed locally in your browser using the Web Audio API and the pitchy library. Nothing is uploaded.

FROM TUNED TO PLAYING

EasyJam writes guitar licks and piano phrases on demand. No signup required to try the tuner — sign up free for the rest.