Google Charts - powerful, simple to use, and free

Google charts provide a variety of charts designed to address your data visualization needs. These charts are based on pure HTML5/SVG technology (adopting VML for old IE versions), so no plugins are required. All of them are interactive, and many are pannable and zoomable. Adding these charts to your page can be done in a few simple steps.

Demo – https://developers.google.com/chart/interactive/docs/gallery

Features:

Rich Gallery

Choose from a variety of charts. From simple scatter plots to hierarchical treemaps, find the best fit for your data.

Customizable

Make the charts your own. Configure an extensive set of options to perfectly match the look and feel of your website.

HTML5 / SVG

Cross-browser compatibility (adopting VML for older IE versions) and cross-platform portability to iOS and new Android releases. No plugins are needed.

Free

Use the same chart tools Google uses, completely free and with three years’ backward compatibility guaranteed.

Controls and Dashboards

Easily connect charts and controls into an interactive dashboard.

Dynamic Data

Connect to your data in real time using a variety of data connection tools and protocols.