12NOTEZ · Free Tool

Online Guitar Tuner

Tune your guitar with your mic — Standard — E A D G B E. Free, accurate, private.

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Press Start and allow mic
♭ flat
sharp ♯
E
A
D
G
B
E

Your audio never leaves your device — detection runs entirely in your browser.

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Guitar tuning: Standard — E A D G B E

Standard guitar tuning is E A D G B E from the thick 6th string to the thin 1st string. Pluck one string at a time and let the needle settle in the green.

E2A2D3G3B3E4

Quick way to remember the strings: Eddie Ate Dynamite, Good Bye Eddie.

How to tune a guitar

  1. Allow microphone access and play your low (thick) E string open.
  2. Match the needle to E2 — turn the tuning peg until it reads in-tune (green).
  3. Work up the strings: A2, D3, G3, B3, then the high E4.
  4. Re-check the low E last — tightening later strings can pull it slightly flat.

Alternate guitar tunings

TuningNotes
Drop DD A D G B E — drop the low E a whole step for heavier riffs
Half-step down (Eb)Eb Ab Db Gb Bb Eb — common in rock for a darker tone and easier vocals
DADGADD A D G A D — Celtic, folk and modal fingerstyle
Open GD G D G B D — slide and Rolling-Stones-style rhythm

Switch the instrument selector above to chromatic mode to tune to any of these notes by ear.

Frequently Asked Questions

What is standard guitar tuning?

Standard guitar tuning is Standard — E A D G B E — strings E2, A2, D3, G3, B3, E4 from lowest to highest.

How do you tune a guitar?

Allow microphone access and play your low (thick) E string open. Match the needle to E2 — turn the tuning peg until it reads in-tune (green). Match each string to the needle until it reads in-tune (green).

What are the guitar string notes?

From low to high, the strings are E2, A2, D3, G3, B3, E4.

Can I tune a guitar with my phone mic?

Yes — this tuner uses your device microphone with cents-precise pitch detection, runs entirely in your browser, and your audio never leaves your device.

Tune another instrument

Bass GuitarUkuleleViolinMandolinCelloBanjo

Prefer to set tempo instead? Try the free online metronome, or find any song's key in our database.