Free Online Tuner
Tune any instrument by ear with your microphone - a free chromatic tuner in your browser.
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Allow microphone access, then play a single note.
-50cents+50
Online Tuner - Free Chromatic Tuner for Any Instrument
A free online tuner that listens through your microphone and shows the note you're playing, how many cents sharp or flat you are, and the exact pitch in Hz, in real time. Chromatic by design, so it tunes guitar, bass, violin, ukulele, brass, woodwind, and voice. No app, no account, nothing to install; the audio never leaves your browser.
- Hear and see your pitch.
- The note, cents offset, and frequency update live as you play.
- Any instrument.
- Chromatic tuning for strings, brass, woodwind, and voice.
- Private & free.
- Your mic audio stays in the browser, no upload, no sign-up.
Tune with confidence
A precise, honest reading you can trust.
- Cents-accurate
- A clear meter shows exactly how sharp or flat you are, down to the cent.
- Real-time detection
- Pitch is detected continuously as you play, with no lag.
- Frequency in Hz
- See the exact frequency, not just the note name.
- In-tune indicator
- The note turns green the moment you land on pitch.
Tune any instrument by ear
One chromatic tuner for the whole music room, strings, brass, woodwind, keys, and voice.
- Guitar
Tune all six strings to standard or any pitch.
- Bass guitar
Lock in the low strings with a clear cents readout.
- Violin & strings
Fine-tune to the cent for orchestral pitch.
- Ukulele
Quick GCEA tuning by ear with your mic.
- Piano & keys
Check pitch against true equal temperament.
- Brass
Tune trumpet, trombone, and more by ear.
- Woodwind
Get clarinet, sax, and flute in tune fast.
- Voice
Find your pitch and match it note for note.
- Ensembles
Get the whole group on the same pitch.
How to tune online
Three steps to perfect pitch.
Allow your mic
Press Start and let the tuner listen through your microphone.
Play a note
Pluck a string or sing a note, one at a time works best.
Tune to center
Adjust until the needle sits in the middle and the note turns green.
A tuner that's always with you
Open a tab and you're ready to play in tune.
- Works in your browser
No app or plugin, open the page and start tuning.
- Private by design
Your microphone audio is processed locally and never uploaded.
- Free, no sign-up
Unlimited tuning with no account and no ads on the meter.
Tuning, explained
The tuner at a glance
- Chromatic notes detected
- 12
- Cent precision
- ±1
- Hz concert pitch
- A=440
- Apps to install
- 0
- Free, no sign-up
- 100%
- Audio uploaded
- 0
Trusted by players and teachers
“The cents meter is precise enough for my advanced students. We tune up in seconds at the start of every lesson.”
Sofia Marino
Violin teacher
“I keep this bookmarked instead of a clip-on tuner. It hears my guitar clearly and the green 'in tune' is unmistakable.”
Tom Becker
Guitarist
“Finally a tuner that just works in the browser. I tune my uke by ear in moments, no app required.”
Priya Sharma
Ukulele player
Online tuner FAQ
- Is the online tuner free?
- Yes, it's completely free, with no account, no sign-up, and nothing to install.
- What instruments can I tune?
- Any of them. It's a chromatic tuner, so it works for guitar, bass, violin, ukulele, brass, woodwind, piano, and voice.
- Do I need a microphone?
- Yes. The tuner listens through your device's microphone; just allow access when prompted.
- Is my microphone audio private?
- Completely. Audio is analysed locally in your browser and is never recorded or uploaded.
- What does the cents number mean?
- It shows how far you are from the target note, negative is flat, positive is sharp. Aim for zero.
- Why won't it pick up my note?
- Make sure mic access is allowed and play one clear, sustained note. Background noise can interfere with detection.
- What tuning standard does it use?
- Concert pitch, A4 = 440 Hz, the standard for most modern instruments.
In tune? Now lock the tempo.
Once you're tuned up, practice in time with our free online metronome, or find any song's BPM with Tap BPM.