Online Guitar Tuner

EasyTuner gives you two ways to tune: by ear using built-in reference tones, or by microphone with real-time pitch feedback on the strobe dial. Many players use both — hear the target note first, then fine-tune with the mic until the string locks in.

Reference tones — tune by ear

Tap the 🔊 speaker icon beside any string on the fretboard to play that string's target pitch (for example low E or A). Listen carefully, then pluck the same open string on your guitar and turn the tuning peg until both pitches match — when they are in tune, the two notes blend together with no wobbling “beat” between them.

Turn on Loop below the fretboard to hold the reference tone while you adjust the peg, which makes ear-tuning much easier. Reference tones are also useful if you are learning standard tuning for the first time and want to memorise what each string should sound like before using the microphone.

Strobe dial — tune with your microphone

Press Tap to tune, allow microphone access, and pluck the highlighted open string. The strobe dial shows your pitch in real time: rotating stripes mean you are still out of tune, they slow down as you get closer to the target, and they settle when you are within a few cents of the correct note. The display also shows how many cents sharp or flat you are (1 cent = 1/100 of a semitone), plus plain-language Tune up or Tune down hints so you know which way to turn the peg. A ✓ appears on the fretboard when that string is locked in.

Work through all six strings

With auto-advance enabled (default), the tuner moves to the next string after each one is tuned, from lowest to highest. Turn it off in the sidebar if you prefer to jump between strings yourself. For best results, tune in a quiet room, pluck firmly near the 12th fret, and give new strings a second pass once they have stretched.

A well-tuned guitar sounds richer, stays in tune longer during playing, and makes chords ring clearly. Even slight detuning can make open chords sound muddy and barre chords feel uncomfortable — an online guitar tuner helps you catch small errors before they become a habit.

EasyTuner shows your deviation in cents on the strobe dial — one cent is 1/100 of a semitone. When a string is close enough to the target pitch, it locks with a ✓ on the fretboard. The progress bar tracks how many strings are done so you never lose your place mid-session.

Each open string in standard tuning vibrates at a specific frequency in Hertz — for example low E near 82 Hz and high E near 330 Hz. See our guitar string frequencies chart for the full EADGBE Hz reference and how cents relate to pitch.

After tuning, strum a few chords to double-check. If something still sounds off, revisit that string rather than resetting every peg from scratch.

Tune your guitar before every practice session or performance. Temperature changes, humidity, and playing itself can shift string tension enough to affect sound quality within minutes.

Brand-new strings stretch significantly during the first few days — check tuning after every song until they stabilize. Guitars that sit unused for weeks will almost certainly need a full tuning when picked up again.

If you notice buzzing, dull chords, or notes that clash when playing with others, your guitar likely needs tuning. Keeping a tuner handy makes this a quick habit rather than a chore.