A heatmap is a data visualization technique that uses color intensity to represent numerical values. In a matrix layout, each cell's color corresponds to the data value at that position, with darker colors indicating higher values. This tool supports manual data entry or batch import via CSV format, customizable color schemes, chart dimensions, and more. Generated charts can be exported as PNG or SVG files. Use cases include time-based heat analysis, correlation matrix visualization, geographic heat distribution, user behavior analysis, product feature usage frequency, and other scenarios requiring intuitive 2D data distribution display.