Every string is listening. Play any one of them and the display jumps to it — no manual string selector.
Online guitar tuner
A guitar tuner built for how you actually play
Standard EADGBE, Drop D, DADGAD, Open G, half-step down — all in one browser tuner. Acoustic or electric, phone or laptop. Open it, allow the mic, and the string lights up the moment it is in tune.
Free. No account. Audio never leaves your browser.
Drop D, Double Drop D, DADGAD, Open G, Open D, half-step down and full-step down are one click away.
Tune straight from the mic or plug in an audio interface. Both work at studio accuracy in the browser.
Works on desktop, tablet and phone. Audio is processed on-device and never uploaded.
Tunings
The tunings most guitarists actually use
Standard is the starting point, but every player eventually lives in at least two tunings. Fiume handles them all without making you re-learn the interface.
Standard & half-step down
EADGBE for everything from jazz comping to metal rhythm. Flip to Eb standard for Hendrix, Van Halen and a lot of classic-rock guitar.
Drop tunings
Drop D for folk and heavier rock, Drop C for modern metal, Drop B for extended-range bands. The low string retunes in seconds.
Open & modal tunings
DADGAD for Celtic and fingerstyle, Open G for slide and roots, Open D for Joni Mitchell territory. All preset, all instantly selectable.
Guitarists who use it
Who Fiume’s guitar tuner is for
Different players, same tuner. If you own a guitar and a browser, the use cases are already covered.
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Acoustic players Tune before practice or a living-room gig with nothing but your phone on the table.
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Electric and studio work Route the guitar into any interface and watch cents-level precision right in the browser.
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Fingerstyle & open tunings Switch between standard, DADGAD and Open G without closing the tab or changing apps.
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Metal and drop tunings Go from Drop D down to Drop A# without juggling presets — the engine picks the closest target pitch.
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Teachers Share one link with students so everyone arrives to the lesson already in tune.
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Writers with an odd tuning Capture a new tuning you stumbled onto mid-session and tune back into it tomorrow.
How to tune
Three steps and you are in tune
Same routine every time — start from the low E, work up, then return to the low string to check nothing drifted while you turned the other pegs.
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1
Pick your tuning
Start in Standard or choose Drop D, DADGAD, Open G, Eb or any other preset from the tuner dropdown.
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2
Play each string once
Go low E → A → D → G → B → high E. The tuner jumps to whichever string you played; adjust the peg until the reading sits centered.
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3
Sweep back to check
Re-check the low string at the end. Tension across the neck shifts as you tune, so one sweep back catches any strings that drifted.
FAQ
Guitar tuner questions, answered
Will it work with a 7- or 8-string?
Yes. Extended-range instruments tune the same way; the engine recognises low B and low F# without any special setup.
Why is my low string reading the wrong note?
Usually a sub-harmonic from a loose string or a very dark pickup tone. Pick closer to the bridge, or tighten the string until it reads normally.
Can I use it with a capo?
Yes. With a capo on, each string reads its new pitch. If you want to check the open tuning first, tune without the capo and clip it on after.
Does it handle flat tunings for heavier music?
Yes — Eb, D, C# and C standards are all supported, plus drop variants of each. Useful for most modern rock and metal tracks.
Does it work offline?
The first load requires a connection. After that, the tuner continues to work as long as the tab stays open, even without network.
Is there a free tier for life?
Yes. The browser tuner is free and stays free. Premium features (saved presets, cloud sync) will be optional additions, not paywalled basics.
Tune your guitar in the browser, right now
Standard, drop, open or flat — pick the tuning, play the string, done.
Open guitar tunerFree, private, no account needed.