Guitar Tuner
Tune by ear with reference tones, or use your microphone for automatic pitch detection.
Tuning
Ear Tuner
Tap a string to hear its pitch
Tap a string above to hear it
Tuning ReferenceStandard
Str 6E282.4
Str 5A2110.0
Str 4D3146.8
Str 3G3196.0
Str 2B3246.9
Str 1E4329.6
About this tool
About This Online Guitar Tuner
Guitar Tool Hub's free online guitar tuner works in two modes. The ear tuner plays a precise reference tone for each string so you can tune by listening — no microphone needed. The microphone tuner uses your device's mic to detect the pitch you're playing in real time, shows the closest string match, and displays cents deviation with a visual needle so you can see exactly how sharp or flat you are. Supports standard tuning plus 6 alternate tunings: Drop D, Open G, Open D, DADGAD, Drop C, and Open E.
- 01Ear tuner with reference tones for each string
- 02Microphone tuner with real-time pitch detection
- 03Cents deviation display with visual needle
- 04Auto-play mode cycles through all strings
- 05Standard tuning + 6 alternate tunings
- 06Works on desktop and mobile browsers
- 07Free — no app download needed