Guitar Tuner – Free Online Guitar Tuner With Microphone
Microphone tunerReady
Play each target note through your speakers.
- Quiet room, one string at a time
- Tune up to the note
- ±5 cents counts as in tune
- Runs inside your browser
- No upload, no account
- Nothing saved after you close
Online guitar tuner with microphone
Allow microphone access, play one string at a time and follow the needle until it centres. Six strings from low E2 to high E4 in standard tuning, plus 13 alternate tunings.
Guitar string notes
Standard tuning from thickest to thinnest: E2 (82.41 Hz), A2 (110 Hz), D3 (146.83 Hz), G3 (196 Hz), B3 (246.94 Hz), E4 (329.63 Hz).
How to tune a guitar by ear
Tune the low E to a reference, then fret the 5th fret of each string to match the next open string, except the 4th fret on the G string to tune B.
Alternate guitar tunings
Drop D lowers only the 6th string for heavy riffs; open tunings form a chord on open strings for slide; DADGAD gives a droning modal sound; half-step down eases string tension and matches many rock records.
How to Use the
Guitar Tuner
- 01
Quiet
reduce background noise.
- 02
Allow
press Start Tuner and allow the microphone.
- 03
Pluck
play one string and let it ring.
- 04
Adjust
tighten if the needle is left (flat), loosen if right (sharp) until centred.
Guitar string notes
Standard tuning from thickest to thinnest: E2 (82.41 Hz), A2 (110 Hz), D3 (146.83 Hz), G3 (196 Hz), B3 (246.94 Hz), E4 (329.63 Hz).
How to tune a guitar by ear
Tune the low E to a reference, then fret the 5th fret of each string to match the next open string, except the 4th fret on the G string to tune B.
Alternate guitar tunings
Drop D lowers only the 6th string for heavy riffs; open tunings form a chord on open strings for slide; DADGAD gives a droning modal sound; half-step down eases string tension and matches many rock records.
Tuning stability
New strings stretch; tune, stretch gently, and re-tune. Always tune up to the note to keep tension in the gear.
Tuning with a microphone tuner
The tuner detects pitch from the waveform’s repeating period, shows the nearest target string and how many cents away you are. ±5 cents counts as in tune.
Alternate tuning reference
Drop and lowered tunings
Drop D: D A D G B E · Double drop D: D A D G B D · Drop C: C G C F A D · D standard: D G C F A D · E♭ tuning: E♭ A♭ D♭ G♭ B♭ E♭.
Open tunings
Open D: D A D F♯ A D · Open D minor: D A D F A D · Open E: E B E G♯ B E · Open G: D G D G B D · Open C: C G C G C E.
Modal and artist tunings
DADGAD (Celtic): D A D G A D · Nashville: high-octave E A D G with standard B E · Some songwriters use unusual tunings such as C G C F C E or D G D F♯ G D; the chromatic tuner handles any of these.
Unison “ostrich” tuning
All strings tuned to E in different octaves for drones.
Tuner not reacting?
Check the mic permission, pick the right input device and pluck closer to the mic.
More tunings and questions
Tune quickly with the tuner
Pick a tuning, play each string, follow the needle.
Instructions if you are new
Start with the low E, tune each string, then re-check all six.
Tuning a bass guitar or other instrument
Use the bass tuner or chromatic tuner.
Does the type of guitar matter?
No: acoustic, electric and classical all tune the same way; electrics can also be tuned through an audio interface.
Change to any tuning
Select it from the list; the target notes update.
Drop C, Open D, Open G, Open C and Open D minor
Drop C: C G C F A D. Open D: D A D F♯ A D. Open G: D G D G B D. Open C: C G C G C E. Open D minor: D A D F A D.
E♭ and D standard
E♭: every string a semitone down. D standard: every string a whole tone down (D G C F A D).
Artist and alternative tunings
Folk players use tunings such as C G C F C E; indie bands use D G D F♯ G D or G A B D E G. Use the chromatic tuner to set any string to any note.
Nashville tuning
The lower four strings are replaced by thinner strings tuned an octave higher for a shimmering sound.
Related guides and fixes
Learn more in these guides: How to tune a guitar, What note am I singing, Microphone not working.
Frequently Asked Questions
Q.Why does the needle jump?
Pluck one string at a time and mute others.
Q.Do I need a clip-on tuner?
No, a mic works in a quiet room.
Q.What is a cent?
One hundredth of a semitone.
Q.How do I know which note corresponds to which string?
In standard tuning, from the thickest string to the thinnest: E, A, D, G, B, E.
Q.How do I get back into standard tuning from an alternate tuning?
Select standard tuning and tune each string to E A D G B E, then check again; tension shifts as you change several strings.