- name
- generate-chart
- description
- Generate a chart image using Chart.js. Supports line, bar, pie, doughnut, radar, polarArea, bubble, and scatter chart types.
Generate Chart
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,scatterdata— Chart.js data object withlabelsanddatasets
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"
}'