Other online tuners
Try our browser tuning tools built for different instruments.
Tune by eye as well as by ear
The low C on a cello does not shout. Room rumble, HVAC, and the sympathetic ring from the other strings all compete for your attention, especially five minutes before rehearsal when everyone is talking at once. A chromatic clip can name the note and still leave you wondering whether you should turn the peg another hair. This page is built for that moment: bow or pluck one open string, read the live gauge, and see which peg you are actually working on. Standard C-G-D-A only—no modes to flip, no account to create.
Why a scroll layout beats a single flashing letter
Most clip-on and phone tuners were designed around guitars and violins. They assume you already know which peg you are at, and they give you one note name in the middle of the screen. On a cello, the pegs sit in pairs on the scroll; beginners mix up C and G on the left all the time. Here the headstock graphic places a button on each peg—G and C on the left, D and A on the right—so you are not decoding the interface while your left hand is busy muting strings. Tap a button if you want a reference tone; turn on loop playback if you like to tune against a sustained pitch.
Above the scroll, a semicircular gauge shows the note name, frequency in hertz, and cents offset while you turn. Flat reads negative; sharp reads positive. When you drift far enough off target, a short hint appears at the bottom of the scroll—tighten if you are flat, loosen if you are sharp—so you are not guessing which direction to turn in the middle of a peg rotation. When the reading settles inside a practical window, the peg button turns green and stays green until you switch the mic off. That latch matters when you are working around the instrument and do not want to keep mental track of which string you already fixed.
Visual tuning on the scroll
Four peg buttons match the real layout. Amber marks the string you are playing toward; green means that peg has settled. You see progress instead of re-checking every string from memory.
Gauge you can read mid-bow
The dashboard updates during a sustained bow or a firm pizzicato pluck. Cents resolution is fine enough to make small peg moves meaningful, not just "close enough for jazz."
Hints when you are still off
If the mic hears you on the right string but not quite in tune, the interface tells you flat or sharp in plain language. Less back-and-forth, fewer overshoots.
What you get that a generic tuner app usually skips
Accurate pitch tracking is table stakes. The useful part is tying that reading to the peg in your hand and telling you what to do with it.
The gauge and the scroll work as one system
Chromatic tuners often dump a letter on screen and leave the rest to you. Here the gauge answers "how far off am I?" while the scroll answers "which string am I even on?" Detection is scoped to cello range, including the low C where cheap mics stumble. Reference tones sit on the same peg buttons, so ear tuning and meter tuning share one map. Optional loop playback holds the pitch while you turn slowly—handy after a string change when the wire keeps slipping.
- Live cents readout on a semicircular gauge—readable while you bow, not only on a hard pluck.
- On-screen flat/sharp hints so you turn the peg the right way the first time.
- Green peg latch when a string has settled; quick visual checklist before you pack up.
- C-G-D-A layout fixed to standard orchestral tuning—no wrong preset to select.
- Audio stays in the browser; nothing is uploaded for analysis.
- Runs in a modern phone or laptop browser when you left the clip-on at home.
How to tune a cello with this page
Pre-rehearsal in a school hall
You have three minutes, the percussion section is warming up, and the principal asks for A. Run C-G-D-A once with the mic on; the green pegs are your checklist so you are not re-tuning the same D string twice because you forgot.
Teaching a first-year student
They know the letter names but not which peg belongs to which string. Point at the scroll buttons while they turn—far less confusion than a tuner that only says "G" without context.
After installing a new C string
Stretch, tune, play open strings, tune again. Loop the reference tone on the C peg while you turn in quarter-steps; the gauge shows when you have actually arrived, not when the string merely stopped screaming.
Where people actually use a browser tuner
Not endorsements—just the kinds of situations that come up in lessons and sectionals.
Our rehearsal room piano has seen better days. I keep this tab bookmarked, plug in cheap earbuds so I can hear myself, and go peg by peg. The green lights are embarrassingly useful when the brass are behind me.
Nina P.
Community orchestra · section cello
"I tell students to trust the cents number while they are still learning to hear beats. The scroll picture saves me from drawing peg diagrams on a whiteboard every week."
David K.
Private cello teacher / Middle school studio
"I clip a physical tuner on the bridge at home. On tour I only carry a phone. This reads low C more steadily than the last free app I tried, and I like that it tells me flat or sharp without me squinting at a needle."
Rachel M.
Chamber musician / Summer festival circuit