Data earns its value when it is seen. The 10 open-source chart and visualization libraries below are ranked by GitHub stars (fetched 2026-08-17) — from canvas charts to React-native and geospatial. Each links to its repository.
Match the library to the stack: ECharts/Plotly for breadth, Recharts/Visx/Nivo for React, Victory for cross-platform, and deck.gl for large geospatial datasets.
The choice that matters most is the rendering approach, because it decides how the chart behaves as the dataset grows. SVG output is crisp and easy to style but costs a DOM node per element, so it strains past a few thousand points. Canvas and WebGL output trade that styling convenience for throughput and can carry tens of thousands of marks. Bundle size belongs in the same decision, since a charting library is rarely the only dependency in a page and the largest one tends to dominate first load. Sketch the worst case you actually expect, whether that is a live updating dashboard or a static report, and pick for that rather than for the demo.
