Online Tuner — Free Chromatic Tuner for Every Instrument — PitchFit
Free · No download · Works in any browser

Online Tuner

A precise chromatic tuner that listens through your microphone. Choose your instrument below, grant mic access, and start tuning.

Choose your instrument

Each tuner is preset with the standard tuning for that instrument and highlights the target string as you play.

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Guitar Tuner

Standard EADGBE tuning for acoustic and electric guitar.

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Bass Tuner

Standard EADG tuning for 4-string bass guitar.

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Ukulele Tuner

Standard GCEA tuning with reentrant high G.

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Violin Tuner

Standard GDAE tuning in perfect fifths.

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Chromatic Tuner

Universal tuner that detects any pitch. Works for any instrument.

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Piano Reference

Need reference tones? Our virtual piano plays the notes you are tuning to.

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How it works

Accurate tuning in your browser

Our tuner uses your microphone and the Web Audio API to detect the pitch of your instrument in real time. No app to install, no account needed. Works on desktop, mobile, and tablet.

Musician using the PitchFit free online tuner on a smartphone to tune an acoustic guitar
1

Pick your instrument

Each instrument-specific tuner comes preset with its standard tuning and shows which strings you are tuning to.

2

Allow microphone access

Your browser will ask permission to use the mic. Audio is processed locally in the browser — nothing leaves your device.

3

Play a string

The tuner detects the pitch and shows you whether you are flat, sharp, or in tune. Adjust until the needle centres on green.

Common questions

FAQ

Within about ±2 cents for a clean signal in a quiet room, which is better than most human ears can detect. For studio-grade accuracy, a dedicated strobe tuner is still the gold standard, but for everyday practice this tuner is more than precise enough.
Once the page loads, yes — all pitch detection runs locally in your browser. If you add this site to your home screen, it will work offline after the first visit.
Background noise, reverberant rooms, and very low notes can confuse pitch detection. Try getting closer to the microphone, playing cleaner single notes (not chords), and muting nearby strings. Bass guitars and low piano notes sometimes trigger octave errors — listen to confirm the octave.
Yes — on iOS use Safari, on Android any Chromium-based browser works (Chrome, Edge, Brave). You will need to grant microphone access the first time you visit.
Yes — in each individual tuner page, you can adjust the reference A from 432 Hz to 446 Hz. The default is 440 Hz (concert pitch). Baroque ensembles often use 415 Hz, and some orchestras use 442 Hz for a brighter sound.

Good tuning is only half the battle

The other half is training your ear to hear when something is off. Start free.

Take the free pitch test →