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Visualize chords & scales on the fretboard—instantly.
Interactive tools for guitarists of every level. Learn chord formulas, explore scales, and develop your ear.
Chord of the week
This week's spotlight: G major (G · B · D). Open it in the builder with one tap.
Free Guitar Tools
Everything you need to practice and understand the guitar, right in your browser.
Chord Builder
Visualize any triad on the fretboard. Pick a root and type — see finger positions, note names, and formulas instantly.
Scale Builder
Explore major, minor, and pentatonic scales across the full neck. Great for solos and improvisation.
Metronome
Customizable BPM metronome to sharpen your timing and rhythm practice.
Guitar Tuner
Microphone-based chromatic tuner. Detect pitch in real-time and tune to standard E-A-D-G-B-E.
Welcome to Guitar Chordster
Your interactive platform for learning guitar chords, scales, and music theory. Whether you're a complete beginner or an experienced player, our free tools and guides will help you master the guitar and understand the language of music.
What is Music Theory?
Music theory is the study of the building blocks of music: notes, scales, intervals, chords, rhythm, and harmony. Understanding music theory helps you make sense of what you play, write your own music, and communicate with other musicians.
Notes and the Musical Alphabet
There are 12 unique notes in Western music: C, C#, D, D#, E, F, F#, G, G#, A, A#, and B. These repeat in higher and lower pitches called octaves. On the guitar, each fret raises the pitch by one note (a half step).
Scales: The Foundation of Melody
A scale is a sequence of notes played in order. The most common is the major scale (e.g., C D E F G A B C) and the minor scale (e.g., A B C D E F G A). Scales are the basis for melodies, solos, and improvisation.
Chords: Building Harmony
A chord is a group of notes played together. The most basic chords are triads (three notes): the root, the 3rd, and the 5th. Major chords sound happy, minor chords sound sad. There are also 7th chords, suspended chords, and many more.
Ready to explore?
Pick a tool and start visualizing music on the fretboard — completely free.