A line chart is a type of statistical chart used to display trends in data over time or other continuous variables. By connecting data points with line segments, it visually shows increases, decreases, or fluctuations in the data. This tool supports multiple line series comparison, custom colors, smooth curves, area fills, and more. Generated charts can be exported as PNG or SVG files. Use cases: sales trend analysis, stock price movements, temperature changes, website traffic statistics, and other data visualizations showing time series or trend changes.