Online Tuner – Tune Any Instrument
The best online tuner. Tune your acoustic, electric, or bass guitar instantly using your microphone. Accurate chromatic tuning for Standard, Drop D, Open G, DADGAD, and 44+ alternate tunings. Works on any device.
A4440 Hz
Almost all music uses 440 Hz. Change it only to match a piano or recording that is tuned differently.
G4
String 4392.0 Hz
Press Start Listening, then play one string.
Uses your mic. Audio stays on your device.
Pick a string0/4 tuned
- 1Press Start ListeningAllow the microphone when your browser asks.
- 2Play one stringPluck it once and let it ring.
- 3Turn the peg until it is greenFollow the arrow: tune up if low, down if high.
Use the Tuner Online, Free, on Any Device
Everything runs in the browser. Open the page, allow microphone access, and pitch detection happens on your device — the audio itself never leaves it, and only anonymous usage stats are sent on. There is no app to install, no account to create, and no cap on how often you tune. It behaves the same on a phone backstage as it does on a laptop at home.
A Free Online Tuner for Guitar, Bass, and Ukulele
Pick an instrument and the tuner targets its strings. Guitar runs from standard through drop, open, and downtuned presets, bass covers 4-, 5-, and 6-string setups, and ukulele covers standard GCEA, low G, and baritone. Need only six strings? Open the guitar tuner.
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Need Something Different?
Create your own custom tuning with any number of strings and notes. Perfect for experimental tunings, extended range instruments, or unique setups.