Heatmap maker

Click to upload or drag and drop

Accepts csv, parquet, tsv and json

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Create heatmaps online

Create beautiful heatmaps to visualize patterns and relationships in your data. Perfect for correlation matrices, categorical data analysis, and identifying trends across multiple variables.

Upload your data and create heatmaps instantly

Visualize correlations between variables

Interactive hover effects and value display

Automatic value scaling and coloring

Matrix-style data visualization

Free to use, no account required

How to create a heatmap

  1. Upload data
    Upload your data file in CSV or Excel format
  2. Select variables
    Choose the variables for your matrix visualization
  3. Generate heatmap
    Your data will be automatically scaled and colored
  4. Export
    Download your heatmap as a high-quality image

Heatmap examples

Correlation matrix

Visualize correlations between multiple variables in a matrix format.

Key features:

  • Symmetric correlation matrix visualization
  • Color scale from -1 to 1
  • Value labels in cells
  • Interactive tooltips

Calendar heatmap

Visualize daily patterns and trends throughout the year.

Key features:

  • Daily activity patterns
  • GitHub-style visualization
  • Interactive date selection
  • Custom color ranges

Categorical heatmap

Compare values across different categories with custom color ranges.

Key features:

  • Categorical comparison
  • Custom color gradient
  • Value labels
  • Interactive zoom

Graph makers

Bar graph

Compare values across categories. Perfect for showing differences between groups.

Create graph

Column graph

Similar to bar graphs but with vertical bars. Great for comparing values.

Create graph

Scatter plot

Show relationships between two variables. Identify correlations and patterns.

Create graph

X-Y plot

Create X-Y plots to show correlations and trends between variables.

Create graph

Line graph

Compare trends and patterns over a continuous range. Perfect for showing changes over time or sequences.

Create graph

Time series graph

Visualize data over time. Perfect for temporal analysis and trend discovery.

Create graph

Box plot

Visualize data distributions with quartiles and outliers. Perfect for understanding data spread and identifying anomalies.

Create graph

Histogram

Show frequency distributions of numeric data. Great for understanding data patterns and distributions.

Create graph

Pie chart

Display parts of a whole as proportions or percentages. Perfect for showing composition and relative sizes.

Create graph

Donut chart

A variation of pie charts with a hollow center. Great for showing proportional data while leaving space for additional information.

Create graph

Nightingale chart

A radial visualization that combines aspects of a pie chart and bar chart. Perfect for showing cyclic patterns and comparing proportions.

Create graph

Radar chart

Compare multiple variables in a circular format. Perfect for multivariate data comparison and pattern analysis.

Create graph

Heatmap

Visualize data patterns across two categorical dimensions with color intensity representing values.

Create graph

Sankey diagram

Visualize flow between nodes, perfect for showing transfers or relationships between categories.

Create graph

Stacked bar chart

Compare parts of a whole across categories or show composition changes over time.

Create graph
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