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Online guitar tuner
Sound stays on this device. Nothing is recorded or sent.
Tune your guitar with your microphone, right in the browser. No app, no sign-up. It works for acoustic, electric and classical guitar, 4 and 5-string bass and ukulele.
How to tune your guitar
- Press Turn on microphone and allow access.
- Pluck one open string and let it ring.
- The tuner finds the string. Left of centre is flat: tighten. Right is sharp: loosen.
- Stop when the marker turns green. You hear a short chime and the string gets a tick.
Tune up to the note, not down to it. It holds better. If you go past it, loosen a little and come back up.
Standard guitar tuning (E A D G B E)
| String | Note | Frequency |
|---|---|---|
| 6th (thickest) | E2 | 82.41 Hz |
| 5th | A2 | 110.00 Hz |
| 4th | D3 | 146.83 Hz |
| 3rd | G3 | 196.00 Hz |
| 2nd | B3 | 246.94 Hz |
| 1st (thinnest) | E4 | 329.63 Hz |
An easy way to remember it: Eddie Ate Dynamite, Good Bye Eddie.
Alternate tunings
- Half step down (E♭): every string a semitone lower. Common in rock and grunge.
- Drop D: only the 6th string goes down to D. Power chords with one finger.
- DADGAD and Open G / D / E: open, ringing chords for folk and slide.
Pick any of them from the menu at the top. The tuner shows the right notes for each string.
Bass and ukulele
Bass guitar: E1 (41.20 Hz), A1 (55 Hz), D2 (73.42 Hz), G2 (98 Hz). A 5-string adds a low B0 (30.87 Hz). Ukulele: G4 C4 E4 A4. The G string is higher than the C; that is normal (re-entrant tuning).
Tuning by ear: the 5th fret method
Tune the 6th string first. Press it at the 5th fret: that note should match the open 5th string. Do the same on each string, except the 3rd string: press it at the 4th fret to match the open 2nd string.
Questions
How do I tune my guitar online? Press Turn on microphone, allow access and pluck one open string. The tuner finds the string. Tighten when the marker is left of centre, loosen when it is right, and stop when it turns green.
What are the standard guitar tuning notes? From the thickest string to the thinnest: E2, A2, D3, G3, B3, E4 (82.41, 110, 146.83, 196, 246.94 and 329.63 Hz).
Does the tuner work on a phone? Yes. It runs in the browser on phones, tablets and computers. Hold the phone near the sound hole or the amp.
Is my sound recorded or uploaded? No. The sound is analysed in your browser and never leaves your device.
Can I tune a bass or a ukulele? Yes. Choose Bass (4 or 5 string) or Ukulele (standard, low G, baritone) from the menu at the top.
What does A4 = 440 Hz mean? It is the reference pitch most music uses. Change it only to match a recording or an instrument tuned differently.
In tune? Paste a YouTube link and get the song's chords, or browse songs with easy chords and ukulele chords.