Generate Chart

Generate a chart image using Chart.js. Supports line, bar, pie, doughnut, radar, polarArea, bubble, and scatter chart types.

What It Does

Creates a chart image using the Chart.js library. Supports bar, line, pie, doughnut, radar, polarArea, bubble, and scatter chart types with full Chart.js data and options configuration.

When to Use

• Generate data visualization charts programmatically
• Create chart images for reports, dashboards, or emails
• Produce charts without a browser or frontend

Required Inputs

• chart_type — one of: line, bar, pie, doughnut, radar, polarArea, bubble, scatter
• data — Chart.js data object with labels and datasets

Authentication

Send your API key in the CLIENT-API-KEY header.

Get your free API key at https://pdfapihub.com. Full API documentation is available at https://pdfapihub.com/docs.

Use Cases

• Dashboard Reports — Generate chart images for PDF/email reports without a browser
• Sales Analytics — Create bar/line charts showing revenue, growth, or conversion trends
• Survey Results — Visualize poll or survey data as pie/doughnut charts
• Financial Reports — Produce stock performance or budget allocation charts
• Project Metrics — Generate sprint velocity, burn-down, or team performance charts
• Newsletter Content — Embed data visualizations directly in email newsletters
• Slack/Discord Bots — Generate chart images on-the-fly for chatbot responses

Key Options

Parameter	Description
chart_type	Type of chart (bar, line, pie, etc.)
data	Chart.js data config (labels + datasets)
options	Chart.js options (title, legend, scales)
width / height	Chart dimensions in pixels
output_format	url (default), base64, both, image

Example Usage

curl -X POST https://pdfapihub.com/api/v1/generateChart \
  -H "CLIENT-API-KEY: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "chart_type": "bar",
    "data": {
      "labels": ["Q1", "Q2", "Q3", "Q4"],
      "datasets": [{
        "label": "Revenue",
        "data": [120000, 150000, 180000, 200000],
        "backgroundColor": "rgba(54, 162, 235, 0.6)"
      }]
    },
    "options": { "plugins": { "title": { "display": true, "text": "Quarterly Revenue" } } },
    "width": 800,
    "height": 500,
    "output_format": "url"
  }'