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Guitar Tuner – Tune Any Instrument
The best free online guitar tuner. Tune your acoustic, electric, or bass guitar instantly using your microphone. Accurate chromatic tuning for Standard, Drop D, Open G, DADGAD, and 43+ alternate tunings. Works on any device.
100% Free Forever
43+ Tunings
Works on Any Device
No Download Required
Detected
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Ready to tune
Target
E2
82.4 Hz
-50¢0¢+50¢
Ready
Strings
Standard (E A D G B E) • 6 strings
1E282 Hz
Play
2A2110 Hz
Play
3D3147 Hz
Play
4G3196 Hz
Play
5B3247 Hz
Play
6E4330 Hz
Play
Setup
440.0 Hz
415465
Quick Tips
- •Click a string button to hear the reference tone
- •Green needle means you're in tune
- •Use auto-detect for hands-free tuning
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Create your own custom tuning with any number of strings and notes. Perfect for experimental tunings, extended range instruments, or unique setups.