Chord Diagrammer

A TypeScript library to generate SVG chord diagrams.

Inspired by:

Part of ChordProject


Generates SVG chord diagrams according to received specifications.



Chord Diagrammer is on npm. To install run:

$ npm i chordproject-editor

It’s really easy to draw an SVG chord diagram:

// chord diagram definitions
const chordDiagram = new ChordDiagram({
    frets: [-1, 0, 2, 2, 1, 0],
    fingers: [0, 0, 2, 3, 1, 0],
    baseFret: 1,

// instrument definitions
const instrument = {
    strings: 6,
    fretsOnChord: 4,
    name: "Guitar",
    tunings: ["E", "A", "D", "G", "B", "E"],

const generator = new Diagrammer(); // create an instance of Diagrammer
var svg = generator.builder(chordDiagram, instrument); // build the svg
document.body.appendChild(svg); // add the svg in the html content (here the body)

A ChordDiagram is defined by:

  • frets (array of numbers). Use 0 for open strings and -1 for muted strings. Frets must be relative to the base-fret.
  • fingers (array of numbers). Use 0 for no finger. The fingers array length must match the frets array length. The fingers are optional
  • base-fret (number)


You can customize the diagram by changing the default settings.

For example: = 5; // change the dot radius
builder.settings.neck.lineWidth = 0.8; //change the line width of the neck

Here is all the available settings:

  • dot:
    • radius
    • borderWith
    • openStringRadius
    • stringInfoMargin
  • neck
    • lineWidth
    • baseFretMargin
    • useRoman
    • nutWidth
    • stringNameVisible
    • stringNameMargin


  1. Clone
  2. Install dependencies:
$ npm i
  1. Run in dev mode:
$ npm run start

Open a browser and navigate to http://localhost:8082/ to load the demo.


This project welcomes contributions of all types. If you find any bug or want some new features, please feel free to create an issue or submit a pull request.

Join the community and chat with us on Discord


MIT License


View Github