Violin Tuner Online
Bow or pluck a string and this chromatic microphone tuner shows exactly how many cents sharp or flat it sits — start from the A at 440 Hz and bring G, D, and E in line. Free, nothing recorded.
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 a Violin Online
A first, then the fifths — the way the orchestra does it.
Allow the Microphone
Press Tune my violin and grant mic access when the browser asks. All analysis happens on your device.
Sound the A String
Bow a long, steady note (or pluck). The tuner recognizes the string and shows the offset in cents — begin with the A at 440 Hz.
Fine-Tune to Green
Nudge the fine tuner in the direction shown; save the pegs for big jumps. Green needle, brief hold, check mark — then D, G, and E.
Concert Pitch Without the Guesswork
String recognition, cent-level readings, and an A 440 on demand.
Knows Which String You're Playing
Bow or pluck any string and the tuner identifies it — G, D, A, or E — then measures how far it sits from pitch. Tap a peg to lock one string if you prefer.
Sharp or Flat, Said Outright
Chromatic-tuner precision without the squinting: the readout states which way to adjust, and the needle turns green within 5 cents of center.
An A 440 Whenever You Need One
Each string can sound its reference tone — including the concert-pitch A that orchestras tune from. Set the A first, then work outward like the pros.
Four Strings, Four Checks
Every string that settles within tolerance earns a check on its peg, so a full tune-up reads as a tidy G-D-A-E checklist.
Nothing Leaves Your Device
The microphone signal is analyzed locally, frame by frame, and discarded. No recording, no upload — practice-room privacy guaranteed.
On the Music Stand
Runs in any modern browser on phone, tablet, or laptop — prop it on the stand and tune before every practice session or lesson.
The Practice Room Stays Private
Every frame of sound is measured on your own device and immediately discarded — no take is kept, nothing is uploaded, and the microphone shuts off the instant you press Stop.
No Recording
Frames are analyzed and discarded
No Upload
The analysis runs in your browser
You're in Control
Stop ends mic access instantly
From First Lesson to First Chair
Wood moves, strings settle, rooms change — every session starts with tuning.
Students & Lessons
Arrive with G D A E already true — spend lesson minutes on playing, not pegs
Ensemble Warm-Up
Everyone referenced to the same A 440 before the first downbeat
Daily Practice
Strings drift with temperature and humidity — a quick check starts every session
Recording & Auditions
Intonation work is wasted on an instrument that starts out sharp
Fiddle Players Too
Same four strings, same fifths — bluegrass and classical tune alike
Training Your Fifths
Tune two strings by ear as a double stop, then let the needle verify each
Perfect Fifths, Starting from the A
A violin tunes to G3 D4 A4 E5 — four strings stacked in perfect fifths, spanning from 196 Hz up to 659 Hz, with the A sitting exactly at concert pitch, 440 Hz. That interval structure is why so much violin technique works the way it does, and why a single sour string throws off every double stop and every position shift. This page is a chromatic tuner aimed at those four notes: it hears the string, reads the offset in cents, and tells you plainly whether you’re sharp or flat.
Tune the A first — it’s not just tradition
When an orchestra tunes, the oboe sounds an A and everyone matches it before touching another string. The habit is worth copying at home: set the A to 440 first, then bring the D, G, and E in around it. Working from a fixed anchor keeps the instrument consistent with pianos, recordings, and every other player in the room. Tap the A peg here and it plays a concert-pitch reference — your own pocket oboe — and the needle confirms when the string truly sits at 440 rather than merely close.
Fine tuners for inches, pegs for miles
The most common tuning mishap on a violin isn’t bad ears — it’s over-eager pegs. A peg turn of a few millimeters can move a string by semitones, and a steel E string wound too far past pitch will snap without warning. So: if the tuner shows you within a semitone, reach for the fine tuner at the tailpiece and make small, patient adjustments. Save the pegs for strings that have dropped badly, turn them in small increments while sounding the string, and finish the last stretch with the fine tuner. The cents readout makes this easy — you can literally watch a quarter-turn of a fine tuner walk the needle to center.
Bowing gives the steadiest reading
Pluck or bow — the tuner tracks both. A drawn-out bow stroke at moderate, even pressure is ideal because the pitch holds while you adjust, letting you correct in real time instead of pluck-check-pluck. Keep to one open string at a time (double stops present two pitches and can’t be tracked), and bow closer to the fingerboard for a smoother tone if the needle jitters. Players who like to check their intonation beyond open strings can point the pitch detector at any fingered note, or use the note identifier to name what they hear.
Across the string family
The same chromatic engine tunes the violin’s relatives and neighbors: the cello (fifths again, an octave-and-change lower), the mandolin (the exact same G D A E, in doubled steel courses), plus the guitar and ukulele. And when the practice turns into a take worth keeping, the online audio editor records, denoises, and exports it — same browser, same privacy.
Tuned to 440? Capture the Take
The full Notevibes Online Audio Editor records your playing, cleans up room noise, detects key and tempo, and exports to MP3 or WAV — all in your browser.
Free to try · No credit card required
Related Audio Tools
More free AI audio tools from Notevibes — same engine, no sign-up.
Cello Tuner
Tune C G D A with your mic — fifths made easy.
Mandolin Tuner
Tune all four string pairs to G D A E.
Guitar Tuner
Tune all six strings with your mic — auto string detection.
Pitch Detector
Read the live pitch of any sound — Hz, note, and cents.
Note Identifier
Sing or play a note and see its name instantly.
Vocal Pitch Monitor
Watch your voice draw a live pitch line across a note grid.
Violin Tuner FAQ
How do I tune my violin with this online tuner?
Press the button, allow microphone access, and bow or pluck one string. The tuner identifies the string, shows how many cents sharp or flat it is, and says which way to adjust. Start with the A, correct with the fine tuner until the needle centers and turns green, and repeat for D, G, and E — each string collects a check.
What tuning does it use?
Standard violin tuning — G3 D4 A4 E5, each string a perfect fifth from the next, with the A at concert pitch 440 Hz. That's the tuning used across classical, folk, and fiddle playing alike.
Which string should I tune first?
The A. Orchestras tune to an A 440 before anything else, and setting your A string first — then working to the D, G, and E — keeps the instrument internally consistent. Tap the A peg to hear a concert-pitch reference tone any time.
Should I use the pegs or the fine tuners?
Fine tuners for small corrections — anything within a semitone or so — and pegs only when a string is far off. A tiny peg movement changes pitch a lot, and steel E strings in particular can snap if you crank the peg, so approach the E with its fine tuner whenever possible.
Should I bow or pluck while tuning?
Both read fine here. A long, steady bow stroke at moderate volume gives the most stable needle, since the note sustains while you adjust. Plucking works too — the note just fades, so pluck again after each correction. Either way, play one string at a time.
Is anything recorded or uploaded?
No. The sound is analyzed on your own device in real time and discarded frame by frame — nothing is recorded, stored, or sent to any server, and the mic switches off when you press Stop.
Is it free?
Completely free — no account, no app to install, no limits. It runs entirely in your browser and only asks for microphone permission, which you can revoke at any time.