Online Guitar Tunerfree
Free guitar tuner: turn on, play an open string and watch the indicator. When 'Perfect' is shown — the string is tuned, move to the next one.
Current String
Low E — thickest string
E
6
A
5
D
4
G
3
B
2
E
1
Low
Perfect
High
Arrow left — string is too low, tighten the tuning peg. Arrow right — string is too high, loosen the tuning peg.
quick start
How to tune guitar online
Free online guitar tuner works directly in your browser. All you need is your microphone and a bit of quiet around. Follow simple steps to tune your guitar in a couple of minutes.
- Press the 'Start' button and bring your guitar closer to the microphone.
- Play the open string you want to tune.
- Watch the tuner arrow: left — 'lower', right — 'higher'.
- Tighten or loosen the tuning peg until the indicator shows 'Perfect'.
guitar tuning
Standard tuning for acoustic and electric guitar
E-A-D-G-B-E — universal tuning for six-string guitar of all types. Suitable for acoustic and electric guitars.
E₆
low E
A₅
A
D₄
D
G₃
G
B₂
B
E₁
high E
After tuning all strings, check the tuning again — tension may change slightly.
?FAQ
frequently asked questionsHow to tune guitar online?
Our online tuner works directly in your browser without installing any software. Simply allow microphone access, select a string, and follow the tuner's guidance. Completely free and no registration required.
Does guitar tuner work on phone?
Yes, the tuner works on all devices with a microphone: smartphones, tablets, laptops, and computers. All modern browsers are supported (Chrome, Safari, Firefox, Edge).
Do I need registration for tuner?
No registration required. The tuner works immediately after opening the page. Simply allow microphone access and start tuning your guitar.
Why does guitar go out of tune?
A guitar can go out of tune due to new strings, temperature and humidity changes, frequent playing, or worn tuning pegs. Regular tuning before playing is normal practice for any guitarist.