FretTool
Fretboard diagrams for guitar, bass, ukulele. Chords, scales
FretTool launched on August 4, 2026 with 1 votes, #11,494 of 23,274 launches that month.
What it does
FretTool is a free fretboard diagram editor for guitar and other string instruments. Sketch chords, scales and fingerings, form barres automatically, add labels, and export print-ready PDFs.
Sketch chords, scales and fingerings the way you think about them — click to drop a note, let barres form by themselves, scribble a label, then send it off as a PDF. Everything you need to map out a song — without fighting your software. Left-click to drop a dot. Hold a modifier and you get a square, a triangle, or a wee one for passing tones. Put dots on neighbouring strings at the same fret and a barre appears. Split, merge and recolour it however you like. Tag any dot with a two-character note — finger numbers, intervals, anything that helps you remember. Right-click an empty spot to mark a string as muted or open. No more guessing which strings stay quiet. Export crisp diagrams with…from rkaluzny.github.io
Does a similar job
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Guitar Dashboard – Open source music theory explorer for guitarists2018 · guitardashboard.com · ▲590A free, open source, music theory explorer for guitarists. Discover how scales and modes map to the fretboard and how chords work within scales.
Kord – Python tool for displaying guitar chords/scales on your terminal2020 · github.com · ▲173python framework for creating music applications. Contribute to synestematic/kord development by creating an account on GitHub.
Interactive guitar scales diagrams2018 · grunfy.com · ▲277Guitar scale diagrams and charts, with color CAGED shapes for pentatonic, blues, major and minor scales.

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