Pick your instrument
Choose Chromatic for any instrument, or your instrument and tuning to see each string's target note.
WAVESPEED AI TUNER Sound stays on your device
100% FREE
Free Online TunerGuitar, bass, ukulele, violin or any instrument.
Play a note into your microphone and see how far it is from the right pitch, in cents, on a needle or a strobe.
Pick your instrument and tuning to get each string's target, or hear a reference tone and tune by ear.
Within 1 cent on a clean tone26 instrument tuningsMicrophone stays private
No sign-up No upload Works on phones
Loading the tuner…
The microphone sound is analysed in your browser. Nothing is recorded or uploaded.
THREE SIMPLE STEPS
How to tune with the online tuner
Allow the microphone
Press Start tuner and allow the microphone. Play one string at a time and let it ring.
Turn the peg
Tune up when the needle is left of centre and down when it is right, until it turns green.
Everything you need to get in tune
Accurate pitch detection
The tuner finds the note's fundamental even when the overtones are louder than the note itself, so low strings don't read an octave off. On a clean tone it is within 1 cent.
Needle or strobe
Read the offset in cents on a needle with a green zone of ±3 cents, or switch to a strobe band that stands still when you are in tune.
Instruments and tunings
Guitar (standard, drop D, DADGAD, open G, open D and more, 7-string), bass (4, 5 and 6 strings), ukulele, violin, viola, cello, double bass, mandolin, banjo, bouzouki and oud.
Guided string by string
Auto mode recognises which string you are playing. Tuned strings get a tick, and you see when the whole instrument is in tune.
Calibration and transposition
Set A4 anywhere from 410 to 480 Hz (432, 442 and 443 included) and read notes for B♭, E♭ or F instruments.
Tune by ear
Tap a string to hear it as a plucked string, a pure tone or an organ, hold a note while you tune, or use the beat helper to hear intervals beat.
Tips for tuning
One note at a time
Play a single string and mute the others: several notes at once confuse any tuner.
Tune up to the note
If a string is sharp, go below the note first and then bring it up. The string holds its pitch better.
Quiet room, close microphone
Hold the phone or laptop close to the instrument. Background noise and fans make the reading wobble.
Let the string ring
The first moment of a pluck is a little sharp. Read the needle once the note settles.
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Tuner FAQ
Is this online tuner free?
Yes. Use it as often as you like with no account and no limits.
How accurate is it?
On a clean, steady tone the reading is within 1 cent of the true pitch. A real string drifts as it rings and room noise adds wobble, so expect the last digit to move a little; the smoothing and the steadiness bar help you read it.
Is my microphone sound recorded or uploaded?
No. The sound is analysed in your browser while the tuner runs and is never recorded or sent anywhere.
Which instruments can I tune?
Any instrument with the chromatic tuner, and with string targets: guitar (many tunings, 7-string), bass (4, 5 and 6 strings), ukulele (standard, low G, baritone), violin, viola, cello, double bass, mandolin, banjo, Irish bouzouki and oud.
What is A4 = 440 Hz, and should I change it?
It is the reference pitch everything is tuned from. Most music uses 440 Hz. Some orchestras use 442 or 443 Hz and some players prefer 432 Hz; set it to match the band or recording you play with.
Why does the tuner show the wrong octave or note?
Make sure only one string is ringing and the microphone is close. Picking the string in the list (instead of Auto) makes the tuner compare against that string only.
The browser blocked the microphone. What now?
Click the lock or settings icon next to the address, set Microphone to Allow and reload. On a phone, also check that the browser may use the microphone in the system settings.
What does transposition do?
Players of B♭, E♭ or F instruments (trumpet, clarinet, saxophone, horn) can read the note as it is written in their part instead of concert pitch.
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