Online Guitar Tuner
Play a string: the tuner recognizes it and tells you whether to tighten or loosen it. Standard E A D G B E tuning, alternate tunings, ukulele and bass, with reference tones.
- Via the mic
- Chromatic mode
- Ukulele and bass
- 100% private
100% private — Everything is processed directly in your browser: your files, voice, and image are never sent to Chatzam's servers.
How to tune your guitar online?
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Turn on the mic
Launch the tuner and allow mic access. Find a quiet spot, near your computer or phone.
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Play a string
Pluck an open string and let it ring: the string is recognized automatically and the needle shows the offset in cents.
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Adjust
Turn the tuning peg until the tuner shows “in tune”, then move on to the next string.
A precise tuner for every string
Automatic detection
Play any string: the tuner knows which one you're tuning. Chromatic mode recognizes every note.
Alternate tunings
Standard, Drop D, D standard, Open G, DADGAD, plus ukulele (GCEA) and 4-string bass.
Reference tones
Listen to each string's note to tune by ear.
Adjustable A
The A4 reference is 440 Hz by default, adjustable from 432 to 446 Hz to play along with a piano or a recording.
Standard guitar tuning: E A D G B E
A 6-string guitar is tuned, from the lowest (thickest) string to the highest: E, A, D, G, B, E. The two E strings are two octaves apart. Guitarist's tip: always bring a string up to pitch from below, by tightening it, rather than loosening it down to pitch; it holds tune better. Once all six strings are tuned, go through them a second time to check.
Cents and A440: understanding the tuner
The needle measures the offset in cents, that is, hundredths of a semitone. Within 5 cents of the note, the difference is nearly inaudible; at 20 or 30 cents, the guitar clearly sounds out of tune. If the tuner shows “too low”, tighten the string; “too high”, loosen it. The reference is A at 440 Hz (A4), the international standard; some musicians prefer 432 Hz or need to match a slightly out-of-tune piano — that's what the A reference setting is for.
Drop D, Open G, DADGAD, ukulele, and bass
In rock and metal, Drop D lowers the low E string to D to play power chords with a single finger. D standard lowers all the strings by a whole step. Open G gives a G chord on the open strings, widely used in blues and slide guitar, and DADGAD is popular in Celtic and folk music. The tuner also handles ukulele (G C E A, GCEA) and 4-string bass (E A D G). To check your mic before you start, use our “Mic Test”.
Frequently Asked Questions
Is the online guitar tuner accurate?
Yes: it displays the offset in cents, which is precise enough to tune a guitar. For reliable detection, play one string at a time and keep background noise to a minimum.
In what order should I tune guitar strings?
Usually from lowest to highest: low E, A, D, G, B, high E. Go through them a second time once done, since tightening one string can slightly detune the others.
The tuner isn't detecting anything, what can I do?
Check that your browser has permission to use the mic and that the right mic is selected in your system settings. Bring the guitar closer and let the string ring out. Our “Mic Test” helps you check that the mic is picking up sound properly.
Can I tune an electric guitar?
Yes, by playing close to your computer's or phone's mic: even without an amp, the sound of the strings is usually enough. You can also use the reference tones to tune by ear.
Is the sound of my guitar recorded?
No. The mic's input is analyzed live in your browser; it's never recorded or sent anywhere.