# Guitar Tuner

Play one string at a time. The guitar tuner highlights the nearest of the six standard strings, reads the pitch in hertz, shows the deviation in cents, and marks the string in tune inside five cents.

> Canonical: https://aimusicis.com/guitar-tuner

## A guitar tuner built around the six open strings

Standard tuning is six known frequencies, so the guitar tuner can do more than name a pitch: it picks the string you are closest to and measures the distance to it. Play a string, watch the meter settle on that string, and adjust until it centers.

### The six strings in a row

E2, A2, D3, G3, B3 and E4 are listed low to high, and the guitar tuner highlights the one your pitch is nearest.

### Cents to the nearest string

The deviation is measured against the string you are closest to, not a fixed target, so the number is always the adjustment still to make.

### In tune inside five cents

A string is marked in tune within five cents of its target, which is closer than most ears can hear on a single string.

## Tune a guitar in three steps

### Start the microphone

Press start and allow microphone access. The guitar tuner reads the audio in the browser and never records it.

### Play one open string

Pluck a single string and let it ring. The nearest of the six is highlighted and the meter moves with your pitch.

### Adjust until it centers

Tune toward the center: flat reads negative, sharp reads positive, and the string is in tune inside five cents.

## Strings, range and tolerance

### 6 strings

E2 82.41 Hz, A2 110 Hz, D3 146.83 Hz, G3 196 Hz, B3 246.94 Hz and E4 329.63 Hz, listed low to high.

### 82.41 Hz to 329.63 Hz

The span of standard tuning, which sits inside the tuner's wider 50 Hz to 1500 Hz search band.

### 5 cents in tune

A string is marked in tune within five cents of its target frequency.

### 1 string at a time

The guitar tuner reads a single pitch, which is why muted neighbours or a ringing chord confuse it.

## Who uses a guitar tuner

### Guitarists tuning without a clip-on

Pluck each string and read the nearest of the six on a phone or a laptop instead of hunting for a hardware tuner.

### Beginners learning the strings

See the six string names in order and which of them you are actually playing, one pluck at a time.

### Players checking a stored instrument

Confirm a guitar that has sat in its case is still at pitch, string by string, before a session starts.

## Tools related to Guitar Tuner

### [Key & BPM Finder](https://aimusicis.com/key-bpm-finder)

### [Vocal Range Test](https://aimusicis.com/vocal-range-test)

### [Chromatic Tuner](https://aimusicis.com/tuner)

### [Audio Spectrum Analyzer](https://aimusicis.com/audio-spectrum-analyzer)

## Guitar Tuner FAQ

### What tuning does the guitar tuner use?

The guitar tuner uses standard tuning, low to high: E2 82.41 Hz, A2 110 Hz, D3 146.83 Hz, G3 196 Hz, B3 246.94 Hz and E4 329.63 Hz. A string is highlighted once your pitch is nearest to it.

### Can the guitar tuner handle alternate tunings?

The guitar tuner is built around the six standard string frequencies, so a drop or open tuning reads as a deviation from the nearest standard string rather than as the note you are aiming for. The chromatic tuner names whichever note you are actually playing, in any tuning.

### Why does the guitar tuner highlight the wrong string?

The guitar tuner picks the nearest of the six by frequency, so a string tuned far enough away can land closer to its neighbour and highlight that one instead. Bring each string near its own name first and the highlight follows.

### What are the limits of the guitar tuner?

The guitar tuner needs microphone permission and a quiet room, and it hears one string at a time, so a chord, a damped string or a fan will push the reading around. It covers the 82.41 Hz to 329.63 Hz span of standard tuning, does not record the audio, and measures pitch rather than tension or intonation up the fretboard.

### Does the guitar tuner record what it hears?

No. The guitar tuner reads the microphone in the browser, stops as soon as you press stop, and never records, uploads or saves the audio.

### Does the guitar tuner need an account or credits?

No account and no credits are needed, because the guitar tuner runs entirely in the page.

### How many credits does Guitar Tuner use?

Guitar Tuner runs in the browser and draws zero credits.

## Tune any note, not just the six strings

Reach for the chromatic tuner when the note is off the six-string map, or measure the range of a voice instead.

_Last updated August 28, 2026_