Create Heatmaps Instantly

A heatmap is a grid-based chart where each cell is colored to represent a numeric value — darker or more saturated colors indicate higher values. Use a heatmap when you want to compare values across two categorical dimensions simultaneously, such as sales by product and quarter, or web traffic by day and hour. They are especially powerful for spotting patterns, outliers, and correlations that would be invisible in a plain table.

Yes, the core heatmap creator is free with no sign-up required. You can create, customize, and download heatmaps at no cost. Paid plans unlock additional AI credits, CSV/Excel file upload, embed codes, and priority support.

Open the heatmap creator, then add your data points using the data table — each point needs a row label, a column label, and a value. You can type values manually, paste from a spreadsheet, or upload a file (Pro). Once your data is in, select a color scheme and download or share your finished heatmap.

Absolutely. The heatmap generator is a no-code, browser-based tool. Every setting — color scheme, cell size, labels, legend position — is controlled through plain-language menus and toggles. No programming, scripting, or design software is needed.

The heatmap maker includes nine built-in palettes: Viridis, Plasma, Turbo, Reds, Blues, Greens, Greys, Oranges, and Purples. You can also enable custom colors to set your own hex values for the minimum and maximum ends of the scale, which is ideal for brand-matched or accessibility-focused designs.

Enter your variable names as both row labels and column labels, then add each pairwise correlation value as a cell entry. Choose a diverging palette (like Plasma or Turbo) to show positive and negative correlations clearly, then enable cell value labels so viewers see the exact coefficient in each cell.

Yes. Once your heatmap looks exactly how you want it, click the download button to save it as a PNG or SVG. PNG is best for presentations and social sharing. SVG is ideal for high-resolution print or further editing in design tools.

The AI heatmap generator works for any data that fits a two-dimensional grid structure. Describe your rows, columns, and the kind of values you are working with — such as 'monthly sales by product category for a retail business' — and the AI creates a realistic sample you can immediately replace with your real figures.

The heatmap creator supports matrices of varying sizes depending on your screen and use case. For readability, heatmaps with up to 15-20 rows and columns tend to work best. For very large matrices, consider grouping categories or using the cell size and gap controls to fit more data on screen.

Yes. Plus and Pro plans include embed codes that let you drop a live heatmap directly into any website, blog, or CMS with a single snippet. The embedded chart is responsive and renders cleanly on both desktop and mobile.