One-tap permission
Tap Enable microphone and grant permission once. Your audio never leaves the browser — pitch detection runs locally on this page. No upload, no recording.
Practice Tools · v2.4
Browser-Based Guitar Tuner
Tune your guitar straight from the browser using your mic — no app install, no detours from your practice. Clean visual feedback, standard tuning plus 14 of the most-used alternate tunings (drop D, half-step down, DADGAD, open G, open D and more) including 7-string and 8-string presets, and one-tap reference tones for each string.
Tuning Preset
STRINGS (LOW→HIGH):
E · A · D · G · B · E
Settings
Tap to start tuning
The tuner uses your device's microphone to detect pitch in real time. Your audio never leaves your browser — pitch detection runs entirely on this page.
Works on phones, tablets, and desktops. Requires a secure (https://) connection.
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Tap a string to hear its reference tone
Idle
Play a string
How It Works
A tuner that lives in your browser.
Standard or alternate
Choose from standard tuning plus 10 common alternates: drop D, drop C, half-step down, whole-step down, DADGAD, open G, open D, open E, open C, and double drop D.
Real-time pitch
Strike any string. The tuner shows the detected note, your current frequency, and how many cents sharp or flat you are. The needle locks center when you're in tune.
For every player
Includes dedicated presets for 7-string (Standard BEADGBE, Drop A) and 8-string (Standard F♯BEADGBE, Drop E) guitars. Tap any string label to hear a clean reference tone if you'd rather tune by ear. Switch A4 between 440 Hz and 432 Hz if needed.
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Frequently Asked
Tuner FAQ
How accurate is this browser-based guitar tuner?
The tuner is accurate to within ±1–2 cents under normal playing conditions. The in-tune zone is set at ±5 cents, well within the threshold human ears can perceive as in-tune. Under the hood it uses time-domain autocorrelation with sub-sample parabolic interpolation — the same approach used by dedicated tuner hardware.
What alternate tunings does the tuner support?
Fifteen presets covering the most-used tunings. For 6-string guitar: Standard EADGBE, Drop D, Drop C, Half-Step Down (E♭ standard), Whole-Step Down (D standard), DADGAD, Open D, Open G, Open E, Open C, and Double Drop D. For extended range: 7-string Standard (BEADGBE), 7-string Drop A, 8-string Standard (F♯BEADGBE), and 8-string Drop E. Pick your tuning from the dropdown and the tuner snaps to the right target for each string.
What's the difference between A4 = 440 Hz and 432 Hz?
440 Hz is the modern international standard for the A above middle C. 432 Hz is an alternative reference some players prefer for certain genres or feel. Toggling between them rescales every string's target frequency accordingly — the math is correct in both modes, no matter which tuning preset you've chosen.
Does this guitar tuner work on mobile and tablet?
Yes. It works on any modern mobile browser — Chrome, Safari, Firefox, or Edge — provided the connection is HTTPS, which is required for microphone access. No app install required, and the audio never leaves your browser. All pitch detection runs locally on the page.
What does "cents" mean and how does the in-tune zone work?
A cent is one one-hundredth of a semitone. The tuner shows how many cents sharp (+) or flat (–) you are from the nearest target. Inside ±5 cents the readout turns green and the needle locks center. From ±5 to ±15 cents the display turns amber (close); beyond ±15 cents it turns red. The arrow chip tells you exactly which way to turn the peg.
Can I use this tuner for bass or other stringed instruments?
The pitch detector accepts any frequency from roughly 30 Hz to 4500 Hz, so it works in chromatic mode for bass, ukulele, mandolin, banjo, and other stringed instruments. Named-string targeting is calibrated for 6-, 7-, and 8-string guitar specifically — for other instruments, use the chromatic readout (detected note plus cents) as your guide.
Is this guitar tuner free?
Yes, completely free. The Browser-Based Guitar Tuner is part of the Guitar Lick Lab toolkit — a free set of guitar tools built by Music With Marky.
More free tools for guitar players.
The Browser-Based Guitar Tuner is part of a growing toolkit at Guitar Lick Lab. Explore them all and see what else might help your playing.
Explore all Guitar Lick Lab tools →