Tune your guitar with an online tuner
Allow microphone access, pluck one string at a time, and turn the tuning peg until the meter sits in the green zone (±5 cents). Auto mode finds the nearest string by itself; manual mode locks onto the string you pick.
Standard tuning at a glance
| 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 |
Tune in this order, thickest string first — changing one string's tension slightly affects the others.
1. Allow the microphone
Press the enable button and accept the browser's microphone prompt. Without access the tuner cannot hear anything — it will tell you exactly that instead of guessing.
2. Pluck one string at a time
Let the string ring and watch the meter. The note name appears with a cents readout: left of center means flat, right means sharp.
- Pluck near the 12th fret for the cleanest tone
- Mute the other strings with your palm
- Give the meter a second to settle before turning the peg
3. Turn until it is green
- If the meter is left (flat), tighten the string — turn the peg to raise the pitch.
- If it is right (sharp), loosen slightly, then come back up from below.
- Stop when the meter sits in the green zone and the string chip lights up.
- Repeat for all six strings, then re-check the first two.
Tips for a stable tune
- New strings stretch — tune, play hard for a minute, tune again
- Tune up to the note, never down to it
- Quiet room: TV and talking confuse the detector
- Check tuning again after 10 minutes of playing
Limitations
- Needs microphone permission — no mic, no tuning
- Background noise lowers accuracy; it is not a strobe tuner
- Won't fix intonation problems (12th-fret sharp/flat) — that needs a setup
- Bluetooth headsets add latency; the built-in mic is usually better
Sources
FAQ
How accurate is it?
The meter reads within a few cents on a clean signal, and the green zone covers ±5 cents — tighter than most ears can distinguish. It is fine for everyday tuning.
It says no signal. What should I check?
First, allow microphone access when the browser asks. Then pluck one string at a time in a quiet room, close to the microphone.
Why does the needle jump around?
Background noise or a dying string confuses the detector. Mute other strings with your palm and pluck firmly near the 12th fret.
Should I tune up or down to the note?
Always tune up. If you overshoot, go below the target and come back up — strings hold tune better that way.
Does it work on mobile?
Yes, in a mobile browser. It needs microphone permission like on desktop, and a quiet room matters even more.