Which reference pitch does it use?

Fiume defaults to A=440 Hz. You can switch to A=441, A=442, A=443 or A=415 (baroque) in the settings. The change applies instantly to all four strings.

Can it help me tune in perfect fifths?

Yes. After tuning A to the reference, you can check D–A, G–D and A–E as double-stops. The live contour shows whether the interval stays clean across the bow stroke, which a needle tuner cannot.

Will the fine tuners or pegs affect the reading?

No. The tuner reads whatever pitch the string actually produces. Use fine tuners for small adjustments and the pegs for big ones — the tuner does not care which you use.

Does it work for viola, cello or double bass?

Yes. Fiume detects any pitch, so the same tuner works for viola (C G D A), cello (C G D A) and double bass (E A D G). Switch the instrument preset to match your string set.

Is it accurate enough for orchestral work?

Yes. The pitch engine resolves to within a couple of cents in a reasonably quiet room. Most players use it for individual tuning before rehearsal, then tune to the section oboe or concertmaster once the group gathers.

Do I need a special microphone?

No. A laptop or phone microphone is enough. Point the violin toward it and bow with a steady, medium weight. A condenser mic in a quiet room improves stability for very fine adjustments.

Online violin tuner

A violin tuner that takes fifths seriously

G3, D4, A4, E5 — tuned to A=440 or A=442 with cents-level precision, and a live contour that shows whether your double-stop fifths actually lock. Runs in the browser, no install.

Open violin tuner Read the FAQ

Free. No account. Audio stays in your browser.

All four strings at once

Bow any string; the tuner jumps to it. No need to tell it which you are tuning.

A=440 and A=442

Switch reference pitch to match your section. Baroque (A=415) is also supported for period work.

Cents-level precision

See the contour of a held bow stroke — not just a needle flick. Drift becomes obvious.

Private, in the browser

No account, no upload. Audio is processed on-device, the way your violin teacher would prefer.

The fifths problem

Why tuning in fifths is the part that matters

A violin can have every open string “on pitch” and still not be in tune, because the relationships between the strings are what the ear judges. Fiume was built to help with that.

Tune A first

Start with A4 against the reference. Everything else is built off this one note, so a sloppy A means sloppy fifths everywhere else.

Check the fifths as pairs

Bow A–D, then D–G, then A–E as double-stops. The contour should hold steady — if it wobbles, the fifth is not quite true.

Small moves with the fine tuners

Big adjustments belong at the pegs. Once you are close, the fine tuners let you fix the last two or three cents without overshooting.

Players who use it

Situations Fiume’s violin tuner was built for

From weekly lessons to orchestral pit work, the same tuner covers the common use cases without asking you to install anything.

Students and early learners Get in tune before the lesson so you and your teacher spend time on playing, not on pegs.
Orchestra rehearsal Check your strings before the section tunes together. Flip to A=442 when your group uses a higher pitch standard.
Chamber music Compare your A to the other strings in the quartet. Shared reference, same tab, no extra hardware.
Fiddle and folk Works for cross-tunings like A D A E. Any open pitch is detected; you are not locked to standard only.
Baroque and historical Switch to A=415 for period instruments without hunting for a specialised tuner.
Teachers and studios Share one link; every student opens the same tuner on any device and is ready when the lesson begins.

How to tune

Three passes to a clean set of fifths

The classical routine — A first, outward, then back. Fiume just makes each pass more obvious.

1
Set A against the reference

Bow A4 with a medium-weight stroke. Nudge with the fine tuner until the contour sits centered for a full second.
2
Work outward: D, G, then E

Move in fifths from the A. Check each new string as a single note first, then as a double-stop with its neighbour.
3
Sweep back and commit

Return to A. Neck tension shifts as you tune, so a final pass catches strings that drifted while you adjusted the others.

FAQ

Violin tuner questions, answered

Do I need an electronic tuner on a clip?

Not for practice or studio work. A browser tuner is more informative because it shows how the note behaved, not just a final snapshot.

What if my open string reads a minor third off?

The tuner is reading whatever the string is producing. Turn the peg until the reading lands on the expected letter name, then use the fine tuner from there.

Can I use it with a shoulder rest and mic clip?

Yes — a small clip-on or lavaliere microphone close to the bridge gives a very clean signal and reduces room noise.

Does it listen while I practice scales?

Yes. Leave the tab open and Fiume continues to track pitch, so you can use the same page for tuning and for intonation drills.

Does A=442 affect all four strings?

Yes. The whole set shifts together. G, D, A and E are all recalculated from the new reference, so the fifths still line up correctly.

Is audio sent to a server?

No. Pitch detection runs entirely in your browser tab. Nothing you play gets uploaded or stored anywhere.

Tune your violin, in fifths, in the browser

Open the tuner, set your A, and walk the strings outward. Fiume does the judging in between.

Open violin tuner

Free, private, no account needed.