Free online tuner

Tune your instrument.
Perfectly in tune.

Acoustic guitar, electric guitar, bass or ukulele. Listen to each reference note or use your microphone for fast, accurate automatic tuning.

Start tuning ↓

01 — Instrument

Choose your instrument

01 Acoustic guitar6 strings · E A D G B E 02 Electric guitar6 strings · E A D G B E 03 Bass4 strings · E A D G 04 Ukulele4 strings · G C E A

02 — Tuner

Acoustic guitar

Tap a string to hear the reference note.

Selected stringE282.41 Hz

03 — How it works

Two ways to tune

By ear

Choose a string, play the reference note and adjust your instrument until both pitches match.

With the microphone

Allow microphone access, play one string and follow the meter. The center means the string is in tune.

Choose a tuning

Standard, Drop D, half-step down and several alternative tunings are built in for guitar.

04 — Tuning guides

Learn to tune each instrument

How to tune an acoustic guitar

Learn how to tune an acoustic guitar to standard E A D G B E, by ear or with a microphone, with exact reference frequencies and practical tuning tips.

Read guide 02

How to tune an electric guitar

Tune an electric guitar online in standard E A D G B E.

Read guide 03

How to tune a bass guitar

Learn how to tune a 4-string bass guitar to E A D G with exact frequencies.

Read guide 04

How to tune a ukulele

Tune a standard ukulele to G C E A with exact reference frequencies.

Read guide