GuitarHarmonyLab Blog
Understand harmony. Play better ideas on the fretboard.
Practical guitar harmony lessons for chord charts, progressions, scales, chord tones, arpeggios and improvisation — always shown on the neck, never just on paper.
Featured guide
Take a photo of any chord chart, get a practice plan
Photograph a chart from a book, a screen or a PDF. See the chords read back, the key, the scale for your level, the notes to target — and a routine you can start tonight.
Chord charts
From the page to the fretboard
Chord chart import
Take a Photo of Any Chord Chart and Get a Practice Plan
Photo or PDF in, key, scale, target notes and a practice routine out.Comparison
Photo Chord Chart → Guitar Harmony Lesson: What Other Apps Miss
Chordify, ChordU, Chord Tracker, Guitar Pro and Ultimate Guitar compared with a complete photo-to-practice workflow.Reading
How to Read a Chord Chart on Guitar
Bars, beats per chord, repeats and every symbol from C to Bm7b5.Key centre
How to Find the Key of a Song on Guitar
Four reliable methods, the major/minor trap and the blues exception.Harmony
What to actually play over the chords
Arpeggios
Arpeggio Lab: Jazz Arpeggios for Guitar, Done Right
Triads, seventh arpeggios, inversions and a rhythmic workout that follows your own chart.Guitar scales
What Scales Should You Play Over a Chord Progression?
Understand the chords first, then choose what to play on the fretboard.Guitar improvisation
How to Use Chord Tones in Guitar Solos
Stop soloing past the chords. Target the right notes as each chord changes.Voice leading
Guide Tones: Connect 3rds and 7ths Through the Changes
Two notes per chord do most of the work. Here is how to link them.Jazz harmony
What Is a II-V-I Progression on Guitar?
The most important jazz cadence — how it works and what to play over it.Reharmonisation
Chord Substitutions on Guitar, Explained
Relative, tritone and secondary dominants — and the rule that keeps them musical.Learn & practice
Levels, styles and routine
Learn harmony
Learn Guitar Harmony Online, Step by Step
Understand chords, scales and improvisation directly on the neck.Courses
Guitar Courses That Connect Theory to the Fretboard
Every lesson becomes a playable exercise you can use in real songs.Levels
Guitar Levels: From Beginner to Advanced
Know exactly what to work on at your level, and when to move up.Styles
One Tool, Every Style: Blues, Rock, Metal, Jazz
The harmony behind each style, on one verified fretboard.Practice
Practise Guitar Harmony Every Day
A simple, repeatable 15-minute routine — and real progress.For teachers
Prepare, assign and track
Lesson planning
How to Prepare a Guitar Lesson From a Chord Chart
One chart, five steps, a printed handout and a trackable assignment in one workflow.Teacher Studio
Teacher Studio: The Guitar Teacher’s Toolkit
A chord chart becomes level-based exercises, visuals and simple tracking.Start here
What GuitarHarmonyLab is
Product overview
What Is GuitarHarmonyLab? The Visual Guitar Harmony App
Turn a chord chart into a fretboard map, harmony lessons and playable exercises.Fretboard
The Verified Guitar Fretboard: See Every Note in Context
Every note, scale and chord tone in its real place — the fastest way to learn the neck.Comparison
Best Guitar Theory and Fretboard Apps in 2026
What to look for in a theory app — and how GuitarHarmonyLab compares.About
The Story Behind GuitarHarmonyLab
Built by a web developer and guitarist to finally connect theory to the neck.Turn lessons into real guitar practice
Turn chord progressions into playable fretboard choices.
GuitarHarmonyLab helps guitarists analyse harmony and see stronger scale, chord tone and arpeggio choices directly on the fretboard.