Chart Data Builder

Build chart configurations for popular libraries

Chart Type

Chart Title

Dataset Name

Labels (comma separated)

Values (comma separated)

Chart.js ConfigChart.js Code Snippet

// Chart.js configuration
const ctx = document.getElementById('myChart').getContext('2d');
const myChart = new Chart(ctx, );

D3.js Data Format

// D3.js data format
const data = [
  {
    "label": "Jan",
    "value": 10
  },
  {
    "label": "Feb",
    "value": 20
  },
  {
    "label": "Mar",
    "value": 15
  },
  {
    "label": "Apr",
    "value": 25
  },
  {
    "label": "May",
    "value": 30
  }
];

About the Chart Data Builder

This chart data builder turns labels and values into the JSON structure charting libraries expect, covering the datasets, labels and options shape used by Chart.js, D3 and similar libraries — so a first chart can be on screen without hand-writing config.

A chart data builder removes the friction between having numbers and having a chart. Charting libraries want a specific nested shape — a labels array alongside a datasets array of objects, each with its own data array and styling — and assembling that by hand for a quick chart is disproportionate work.

Getting the shape wrong is the usual first failure. Chart.js in particular renders nothing at all if labels and data lengths do not match, or if datasets is an object where an array was expected, and the console error rarely points at the actual mistake.

Enter your labels and values and the correct structure is generated, ready to paste into your chart initialisation. Useful for prototypes, documentation examples and getting a first chart on screen before wiring up a real data source.

How to use the Chart Data Builder

Choose the chart type. Pick the type you are building for.
Enter labels and values. Provide the categories and their numbers.
Generate the structure. The JSON data object is produced.
Paste into your chart. Drop it into your Chart.js or D3 initialisation.

Chart Data Builder features

Chart.js compatible data structure
Works for D3 and other library shapes
Labels and datasets generated together
Multiple dataset support
Valid JSON output ready to paste
Runs entirely in your browser

Frequently asked questions

Which libraries is the output compatible with?

Chart.js primarily, and the same labels-and-datasets shape works for D3 and most other charting libraries.

Why does my chart render nothing?

Usually the labels and data arrays are different lengths, or datasets is an object where an array is expected.

Can I build multiple datasets?

Yes. Several datasets can be generated in one structure for grouped or multi-series charts.

Is the output valid JSON?

Yes, ready to paste directly into your chart initialisation.

Is anything uploaded?

No. The builder runs entirely in your browser.