...Over 3 billion charts are rendered for users around the world. Generate chart images with a simple, open API. Our chart API generates chart images, QR codes, and more. We're built on Chart.js, the most popular open-source charting library. We'll render any Chart.js configuration. Start by putting your Chart.js definition in a URL. Let's get creative! You can use all static customization options available in Chart.js. Visit our chart gallery to see different chart types and plugins: bar charts, line graphs, pie charts, and much more. ...