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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
E1
41.2 Hz
-50¢0¢+50¢
Ready
Strings
Bass Standard (E A D G) • 4 strings
1E141 Hz
Play
2A155 Hz
Play
3D273 Hz
Play
4G298 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.