QuickChart

API

Chart image API that turns a Chart.js config into a PNG, SVG or PDF

Price: Free tier, then paid
Access: API key (optional)

About

HTTP API that renders Chart.js configs as images for email, PDFs, chatbots and reports, plus QR codes, barcodes, word clouds and Graphviz. The free tier needs no key but is rate limited. The core server is AGPL-3.0 and can be self-hosted.

What you can do with it

Render a bar, line or pie chart as an image for emails and reports
Generate QR codes and barcodes from a URL or a JSON request
Turn a Graphviz DOT graph or a word list into an image

Get started

POST a Chart.js config to /chart; no key is needed to start
Add the API key from a paid plan to lift rate limits

Example

curl https://quickchart.io/chart \
  -H 'Content-Type: application/json' \
  -d '{
    "version": "4",
    "format": "png",
    "chart": {
      "type": "bar",
      "data": { "labels": ["Hello", "World"], "datasets": [{ "label": "Foo", "data": [1, 2] }] }
    }
  }' \
  -o chart.png

Details

Hosting: Hosted service, Self-hosted
Available in: Worldwide
Official SDKs: JavaScript/TypeScript, Python, Ruby, PHP, C#, Java
MCP server: None