Free Online Guitar Tuner
Tune your guitar right in your browser — no app, no signup, no tracking. Standard EADGBE tuning, real-time pitch detection, accurate to within a couple of cents.
How to use it
Three steps. Thirty seconds.
- 1Tap Start Tuning. Allow microphone access when your browser asks. We never record or upload audio — everything runs on your device.
- 2Pluck a single string. The tuner picks up the pitch and tells you which note you're closest to — E, A, D, G, B, or high e.
- 3Watch the needle. Left of center = flat (tune up). Right = sharp (tune down). When the needle sits dead center and goes green, the string is in tune.
Standard tuning reference
| String | Note | Frequency |
|---|---|---|
| 6th (lowest, 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 (highest, thinnest) | E4 | 329.63 Hz |
More tuners
Frequently asked
How accurate is the Savior Guitar online tuner?
The tuner uses the YIN pitch-detection algorithm with parabolic interpolation, which is the same family of algorithms used in many professional tuners. Accuracy depends mostly on your environment — a quiet room and a single plucked string will give you readings within a couple of cents.
Why does the low E string read unstable?
Low frequencies are harder to detect reliably because the wavelengths are longer. Pluck the string firmly, let the initial pick attack fade, then watch the needle. If it still wobbles, mute the other strings with your palm.
Does this work on phones?
Yes. It runs in any modern browser — Safari and Chrome on iOS and Android both work. You'll be asked to grant microphone access once.
Do you store my audio?
No. All pitch detection happens in your browser. Nothing is uploaded, recorded, or stored. The microphone stream lives only in your device's memory while you're using the tuner.
What's standard guitar tuning?
From low to high: E2 (82.41 Hz), A2 (110 Hz), D3 (146.83 Hz), G3 (196 Hz), B3 (246.94 Hz), E4 (329.63 Hz). The tuner auto-detects which string you're playing and shows you how far sharp or flat you are.
How do I tune to Drop D?
Switch the tuner to Drop D mode. Only the 6th (lowest) string changes — you drop it one whole step from E down to D (73.42 Hz). The other five strings stay the same as standard. Drop D opens up easy power chords on the low strings and is common in rock, metal, and folk.
Tuning is only the first step.
If your guitar still doesn't sound right after tuning — buzzy frets, intonation drift up the neck, action that fights you — a proper setup will change everything. Based in Pikeville, NC, serving Goldsboro and Wayne County.