Microphone · cents meter · reference tones
Online Guitar Tuner for Any Alternate Tuning
Pick a tuning from the list — or type your own, like DADGAC# or Eb Ab Db Gb Bb Eb — allow microphone access and play a string. The tuner works out which string you are on and tells you exactly how far to turn it: "tune down 2 semitones", then cents. No mic? Tap a string to hear its reference tone.
- 20 tunings + type your own
- Measures against each string's target
- Reference tones & drones
- A4 = 432 / 440 / 442 / 444 Hz
Fretboard & chord finder
Pick a tuning and key, click any fret to hear it, and see every scale tone and chord degree across the neck.
Scale & Arpeggio Neck Boxes Show / Hide ▾
Chord voicings
Every playable voicing of each chord in the current key, ranked V1–Vn up the neck. Filter by difficulty or chord type, and use ← → on a card to step through its voicings.
Progression looper & tab
Queue chords, choose a picking pattern and meter, loop it, then export tab, MIDI or a printable chord sheet.
String tension calculator
Total: 103.8 lbs • Avg: 17.3 lbs • All Strings Safe (Balanced) • Custom .010–.046
| Str | Pitch | Scale | Gauge | Tension | Status |
|---|
Guitar tuner
Tune with your microphone to any preset or custom tuning, or tap a string to hear its reference pitch.
Odd-time drum machine
Program custom odd-meter drum grooves in 4/4, 5/4, 6/8, 7/8, 9/8, or 11/8, or enable Sync with Chord Looper so the kit plays behind your chord progressions.
Chord identifier & capo transposer
Tap frets on the neck below or type any 6-string fret grip (like 0-5-3-0-0-0 or X-3-2-0-1-0) to identify every possible chord name, interval formula, and capo equivalent.
Capo & Alternate-Tuning Transposer Equivalents
See how to play this exact concert chord using different capo positions or alternate tunings.
Fretboard & ear trainer
Master note locations across unfamiliar tunings (FACGCE, DAEAC#E, DADGAD, Standard), sharpen interval ear recognition, drill scale degrees, and spell complex chord formulas.
When practicing in alternate tunings such as FACGCE or DAEAC#E, the trainer dynamically recalculates fretboard intervals, open drone strings, and chord voicings so you build genuine muscle memory.
Using the tuner
The tuner listens through the Web Audio API — nothing is recorded or uploaded — and estimates pitch with an autocorrelation detector that works for plucked strings down to a low B. Choose a tuning preset, or type any tuning into the custom box (low string first: DADGAC#, C G D G B D or Eb Ab Db Gb Bb Eb all work), and the six target pitches appear as strings. Play one and the tuner measures it against that string's target — so a low E heading for Drop D reads "tune down 2 semitones", not "in tune". The meter turns green inside ±5 cents and the string gets a ✓ once it holds there. Tap a string to hear its reference tone and lock the tuner onto it; press Auto to go back to detecting the string automatically.
Custom tunings can be fine-tuned string by string with the dropdowns and saved to your tunings list, where every tool on the site can use them. For bass-heavy tunings pluck near the bridge and let the note settle for half a second before reading the needle.
Tips for accurate tuning
- Tune up to pitch. If a string is sharp, drop below the target and come back up so the string winds against the tuner post without slack.
- Stretch new strings before trusting the reading; fresh strings go flat for the first hour of playing.
- Retune twice when changing to a tuning that moves several strings — altering one string changes the neck load and nudges the others.
- Use the drones for ear training: hold a reference tone and tune the string until the beating stops.
Reference pitch
A4 = 440 Hz is the modern standard; many orchestras use 442–443 Hz, and some players prefer 432 Hz for its slightly lower, warmer feel (a difference of about 32 cents). Set the reference in the Tuning & Pitch controls and every target shifts accordingly; the app's synth voices follow the same reference so the chords you audition match your guitar.
Frequently asked questions
Does the tuner work without a microphone?▾
Yes — each target peg plays a reference tone (or a sustained drone) you can tune to by ear. On devices that block microphone access in the browser, this is the fallback.
Which tunings does the tuner support?▾
All 20 built-in tunings (Standard, Eb, D and C standard, Drop D, Drop C, Drop B, DADGAD, Open D, E, G, A and C, FACGCE, DAEAC#E and more) plus any six-string tuning you type in, such as DADGAC# or C G C F C E. Save a custom tuning and it appears in the tunings list on every tool. The display always shows the note you are actually playing as well as the target.
Is this tuner accurate enough for recording?▾
The detector resolves well under 1 cent on a clean plucked note, which is comparable to a clip-on tuner. Accuracy depends on your microphone and background noise; a quiet room and a direct pluck near the bridge give the steadiest reading.
Why does the tuner show a different note than I expect?▾
Wound strings and heavy low tunings produce strong overtones; if the needle jumps an octave or a fifth, pluck more softly and let the attack die before reading. In very low tunings (Drop A, 8-string F#) the fundamental can be weak — the detector still works but may need a cleaner signal.
Related tools & tunings
Found a mistake or want a tuning covered? Leave a note on Ko-fi. Last updated 2026-10-28.