Online Guitar Tuner — Tune by Ear or with Your Mic
Allow microphone access and play a string — we'll show the detected pitch in real time so you can tune your guitar accurately. Free chromatic tuner, 100% in-browser.
Why our online guitar tuner
Chromatic, any string
Detects any note, so it works for guitar, bass, ukulele, violin — any stringed instrument.
Real-time pitch
See the exact note and how far off you are, updated live as you turn the tuning pegs.
100% private
Your microphone audio is processed locally and never recorded or uploaded.
Tune your guitar for free, right in your browser
A tuned guitar is the foundation of everything you play — chords ring correctly, notes don't fight each other, and you sound in tune with recordings and other musicians. This free online tuner uses your device's microphone to detect each string's pitch in real time and shows you exactly how to adjust, with no clip-on tuner or app to install.
Pick your instrument (guitar, bass, or ukulele) and a tuning preset — Standard, Drop D, Drop C, Open G, or Half Step Down for guitar. The strings show up low to high; when you pluck a string the matching one lights up and a dot shows whether you're sharp or flat, in cents. Prefer to tune by ear? Tap the play button next to any string to hear its reference tone.
Everything runs in your browser: your microphone audio is processed locally and never recorded or uploaded. For the most accurate reading, tune in a quiet room and pluck one string at a time. When you're in tune, take the next step and turn your idea into a full song with our AI music generator.
Online Guitar Tuner FAQ
We capture your microphone audio and use pitch detection to find the fundamental frequency of the note you're playing, then map it to the nearest musical note and show how sharp or flat you are.
No. The tuner runs entirely in your browser. Just click start and allow microphone access when your browser asks.
No. Audio is analyzed in real time and discarded instantly — nothing is recorded, stored, or uploaded.
Yes. Because it's chromatic, it detects any pitch, so it works for bass, ukulele, violin, cello, and more — any stringed instrument you can play into the mic.
Switch the tuning dropdown to Drop D. The low string changes to D2 while the rest stay the same as standard (A2 D3 G3 B3 E4). Pluck the low string and adjust until the cents reading is at 0.
Yes. Switch the instrument tab to Bass (4-string standard E1 A1 D2 G2, or Drop D) or Ukulele (standard G4 C4 E4 A4). The tuner is chromatic, so it detects any pitch — the tabs just show the right strings and reference notes.
Pitch detection uses autocorrelation, accurate to within a few cents for a clear single note. For best results, tune in a quiet room, pluck one string at a time, and let it ring. Background noise or full chords will confuse it.
Yes — it works in any mobile browser that supports the microphone (iOS Safari, Chrome on Android). Allow microphone access when prompted. Headphones help avoid feedback.
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In tune? Now write a song
Once your guitar is tuned, turn a chord progression or lyric idea into a full produced track with RaoMusic's AI music generator.