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Play a note — Hz

Space to start / stop  ·  Mic required

440 Hz

Sweetened Tunings

Apply per-string offsets to compensate for fret stretch and string inharmonicity.

Tone Generator

Octave
Playing —

How to Use The Tuner

Pitch Detection: Allow microphone access when prompted. Play a single string to see the detected note.
Strobe View: Watch the moving bars—when they stop moving, your instrument is perfectly in tune.
Settings: Adjust sensitivity or transpose the tuner for different tunings.

Practice Tools

Practice tools from Sean's studio

Tuner, metronome, fretboard maps, harmony references, timing utilities, and creative prompts built for serious guitar practice.

Tuner Chromatic pitch reference — tune by ear or by microphone input.
Metronome Tap tempo, variable subdivision, and accent patterns for steady-time practice.
Fretboard Interactive neck diagram — find every note, scale, and chord shape in any key.
Harmony Builder Chord and scale relationships at a glance — diatonic functions, borrowed chords, and substitutions.
Delay Calculator Enter a BPM, get millisecond values for every note division — dotted, triplet, straight.
Backing Generator Generate a simple chord-loop backing track to improvise or practice solos over.
Rhythm Trainer Clap or tap along to groove patterns — trains your internal feel for backbeats and subdivisions.
Idea State A creative prompt generator — breaks writer's block by giving you a random starting constraint.