Open G Tuning Online Tuner
Tune to D G D G B D and an open strum becomes a G major chord. Three strings come down a whole step from standard — the tuner spots each one as you pluck it, steers it to pitch, and every peg can play its reference note when you’d rather trust your ear.
Tap a peg to hear its note and start tuning — the browser will ask for mic access once. Sound is analyzed on your device, never uploaded.
How to Tune to Open G
Sixth, fifth, and first strings down a whole step; D, G, B stay home.
Let the Mic In
Start the tuner and grant mic access. The pegs read D G D G B D — the two outer strings and the fifth are the ones sitting below standard.
Drop E, A, and High E
Loosen the sixth string to D, the fifth to G, and the first to D, plucking as you turn. The tuner picks out each string by itself; tap a peg to hear its target.
Strum the Proof
Verify the untouched D, G, and B strings, then strum everything open. Six green checks — and a G major chord where standard tuning used to be.
Everything a Slide Tuning Needs
Smart peg detection, chord-tone references, checks you can trust.
Sorts Out Which Peg You Mean
Open G has two Gs and three Ds among its pegs, but you never have to choose — pluck a string and the tuner assigns it to the right target on its own.
Directions in Words, Not Wobbles
Loosen or tighten, spelled out per string, with a cents count shrinking toward zero. The three whole-step drops from standard are hard to get wrong.
Six Pegs, Six Verdicts
Strings check off in green as they land, so you can retune in any order — drop the outer strings first or work low to high, the scoreboard keeps up.
Chord-Tone References
Every peg plays its target note, and in Open G those targets are all G-chord tones — tune by ear against them and the guitar starts agreeing with itself.
Slide Practice Stays Private
The mic feed is measured on your device and discarded frame by frame. No recording, no upload, no account — and Stop closes the mic immediately.
Pocket-Sized Tuner
Works in the browser on iOS, Android, and desktop — porch, green room, or kitchen table, Open G is a tap away.
Heard Once, Kept Never
The tuner treats sound like a measurement, not a message: each slice of mic audio is converted to a pitch reading inside your browser and then destroyed. There is nothing to upload, nothing to store, and pressing Stop hands the microphone straight back.
No Recording
Sound becomes numbers, then nothing
No Upload
Servers never hear a note
You're in Control
Stop returns the mic instantly
The Company Open G Keeps
From Delta porches to stadium riffs, one tuning covers it.
Slide Guitar
The bottleneck tuning — straight-bar chords make slide intonation manageable
Riff-Driven Rock
The one-finger barre chord behind some of rock's most famous riffs
Delta & Country Blues
Fingerpicked blues in Open G is a century-old tradition that still works
Resonator Players
Dobro and steel-body guitars practically expect a G chord across the open strings
Learning Slide From Zero
Open strings sound a chord, so early slide practice sounds musical, not broken
Porch Jams
Retune to G anywhere there's a phone signal — or no signal at all, it's all local
Open G: A Chord Built Into the Guitar
Open G tuning is D G D G B D, and the name says it plainly: strum every string open and out comes a G major chord — root, third, and fifth already arranged, no left hand required. From there the fretboard obeys one beautiful rule: a straight barre across any fret is another major chord. Fifth fret, C. Seventh fret, D. That single fact explains most of the tuning’s hundred-year career in blues, slide, and riff-driven rock.
Three whole steps down from standard
The changed strings are the sixth, fifth, and first — each loosened a whole step. The low E falls to D2, the A string to G2, and the high E to D4, while the fourth, third, and second strings (D, G, B) don’t move an inch. Keep plucking during each descent so the tuner tracks the string; if the auto-detect briefly reads a mid-drop string against the wrong target, a tap on the intended peg locks it in place. Arrival check: the fifth string should now sound an octave below the open third string, and both outer strings should match the fourth string in octaves.
Why slides and riffs both call it home
A bottleneck slide plays whatever lies in a straight line, and Open G makes every straight line a chord — which is why Delta blues players adopted it on resonators and why it remains the default slide tuning today. The same barre-equals-chord logic, played with a finger instead of glass, powers the swaggering open-string riff style that classic rock built on this tuning: hammer two notes onto the barre, pull them off, move the whole shape two frets. One shape, endless mileage. Fingerpickers get their own gift — a G bass drone on two strings under a melody that never has to leave the top three.
Clean readings on doubled notes
Open G’s quirk for a microphone tuner is repetition: three Ds and two Gs share the neck, so sympathetic resonance is everywhere. Damp the strings you aren’t tuning with the side of your palm — otherwise a ringing neighbor an octave away can muddy the reading. Give the two wound drops (D2 and G2) a firm pluck over the neck for a strong fundamental, and take the high D4 slowly; thin strings move a long way per peg turn. Finish with the open strum: in a tuning that is literally a chord, your ear gets the final vote, and any sour string is obvious.
The banjo connection
If the tuning feels familiar from another instrument, it should: the 5-string banjo’s standard tuning is g D G B D — the same G-major stack, traded around a high drone string instead of a guitar’s low sixth. Chord logic moves between the two instruments almost unchanged, and the banjo tuner handles that side of the family. For a raw look at any pitch the mic hears — handy when experimenting between the two — the note identifier names whatever you play.
Trying on the other open tunings
Back to E A D G B E is three strings up — the standard-tuning guitar tuner will walk you there. Open D is the same open-chord idea a fourth lower, favored for deeper slide work, while DADGADhangs the question mark back on the chord — suspended where Open G is resolved. All three share strings with each other, so hopping between them is quicker than you’d think.
G Chord Ringing? Capture It
Slide takes and open-tuning riffs go straight into the Notevibes Online Audio Editor — browser recording, noise cleanup, key and BPM detection, MP3 or WAV out.
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Related Audio Tools
More free AI audio tools from Notevibes — same engine, no sign-up.
Open D Tuning
Tune to D A D F# A D — open strings ring a D major.
DADGAD Tuning
Tune to D A D G A D — the modal Celtic sound.
Banjo Tuner
Tune a 5-string banjo to open G with your mic.
Guitar Tuner
Tune all six strings with your mic — auto string detection.
Drop D Tuning
Tune to D A D G B E — one string down, big low end.
Half Step Down Tuning
Tune to Eb standard — every string one semitone down.
Open G Tuning FAQ
How do I tune my guitar to Open G?
From standard, lower three strings a whole step each: the sixth string E→D, the fifth string A→G, and the first string E→D. The D, G, and B strings in the middle don't move. Pluck each string as you turn — the tuner identifies it automatically and shows the distance to its target in cents — and finish when all six pegs show green.
What is Open G tuning?
Open G is D G D G B D, low to high. Strum all six strings open and you hear a complete G major chord — that's what 'open' means. Fretting straight across any fret with one finger (or a slide) produces another major chord, which is the tuning's whole superpower.
Why do slide players use Open G?
A slide can only play notes in a straight line across the strings, and Open G arranges the strings so a straight line is always a major chord. That turns intonation into a single skill — keeping the slide parallel over the fret — instead of a note-by-note fight. It's been the backbone of blues and rock slide playing for a century.
Which chords are easy in Open G?
Major chords are nearly free: open strings give you G, a full barre at the fifth fret gives C, at the seventh D — one finger per chord. Add two fretted notes to the barre shape and you get the moveable major-with-a-6th and sus voicings that define the classic Open G rock sound.
Is banjo Open G the same as guitar Open G?
They're close relatives. A 5-string banjo's standard tuning is g D G B D — the same G-major chord tones as guitar Open G, minus the guitar's low sixth string and with a high drone string instead. If you play both, the chord logic transfers directly; our banjo tuner covers that version.
Is the Open G tuner free, and does it store audio?
Free — no account, no app — and nothing is stored. Pitch analysis runs in your browser and discards each audio frame as soon as it's measured; no sound is recorded or uploaded, and the mic turns off the moment you hit Stop.