What types of heat maps can I create?

You can create five types: Matrix heat maps from tabular data, Correlation heat maps that auto-calculate correlations, Image Overlay heat maps on custom images, Calendar heat maps for date-based data, and Density heat maps for X/Y point data.

What data formats are supported?

Upload CSV or TSV files, or paste data directly. The tool auto-detects delimiters and handles headers. Sample datasets are included for testing.

Can I cluster rows and columns?

Yes! Hierarchical clustering is supported with multiple distance metrics (Euclidean, Manhattan, Cosine) and linkage methods (Complete, Single, Average, Ward). Dendrograms are drawn alongside the heatmap.

How do I export my heat map?

Click the Export button to download as PNG or PDF. The export includes legends, labels, and dendrograms exactly as displayed.

Is my data stored anywhere?

No. All processing happens in your browser. Your data never leaves your device. Settings are saved locally for convenience.

Free Online Heat Map Generator (No Signup)

Free Online Heat Map Generator (No Signup) – FreeWWW

🔥 Heat Map Generator