Browser-local harmony tool

Chord Workbench

Choose a root, chord type, inversion, and instrument view to generate chord tones, intervals, guitar frets, piano keys, and common progressions locally in your browser.

Local

Offline-first

Chord Parameters

Input

Root note Chord type Inversion Voicing Instrument view Mode Progression template

Choose parameters, then generate or change any option to refresh the result.

Result Overview

Output

Chord name

Chord tones

Intervals

1 · 3 · 5

Current bass

Scale-degree formula

1 3 5

Copyable text

Instrument View

Diagram

Highlighted dots are chord tones; cyan marks the root.

Guitar frets 0-12

Piano keys C4-B5

Common Progressions

Reference

Generated from the current root and mode as a practice or arranging starter.

Micro Tools Matrix Chord Workbench is a pure front-end harmony reference that works offline after the page is cached. It calculates chord tones, interval formulas, inversion bass notes, guitar fret highlights from 0 to 12, piano-key highlights from C4 to B5, and common Roman-numeral progressions from the selected root. The page uses no external CDN and sends nothing to a server; audio preview is created only after the user clicks Play through the browser Web Audio API. It is useful beside a DAW, score editor, lesson plan, or practice notebook when checking chords such as Cmaj9, Am7, G7, Dsus4, or Fadd9.

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