Free online guitar tuner
Pluck one string at a time and the tuner shows the nearest string, and whether it is too high or too low, in cents (hundredths of a semitone).
It listens through your microphone only while it is switched on. The sound is analysed on your device; nothing is recorded or uploaded.
Free, no sign-up, works on phones. Nothing you play is recorded.
Guitar tuner
Standard tuning, low to high: E A D G B E. Pluck one string at a time. Sound is checked on this device only; nothing is recorded or sent.
How to use it
- Press Start tuner and allow the microphone when your browser asks.
- Standard tuning from the thickest string to the thinnest: E2, A2, D3, G3, B3, E4.
- Turn the tuning peg slowly: tighten if the note is too low, loosen if it is too high, until it shows In tune.
- A quiet room works best. For other instruments, the reference pitch tool plays a steady note to tune to.
Learn more: Guitar theory: tuning, TAB and chords
More free tools
- Reference pitch and dronePlay a steady reference note, such as A4 at 440 Hz, to tune to or to practise scales over and hear your intonation. Any note, octaves 2 to 5.
- Guitar chord chartChord diagrams for the common open guitar chords beginners learn first, with finger numbers and which strings to play or leave out.
- Chord transposer and capo helperMove a chord progression up or down any number of semitones, or see what chord shapes sound like with a capo. Handles slash chords like D/F#.
Every tool is also in the Quick tools button in the corner of each page.
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