Heatmap Maker
Visualize intensity patterns across dimensions. Create professional, interactive Heatmaps in seconds without any design or coding skills.
Create Your Heatmap NowInstant Creation
Generate charts in seconds
Fully Customizable
Colors, labels, and styling
Export Ready
PNG, SVG, and PDF
Free to Start
No credit card required
What is a Heatmap?
Heatmaps use color intensity to represent data values in a two-dimensional grid, with different colors indicating different magnitudes. This visualization technique makes it easy to spot patterns, concentrations, and anomalies at a glance. Heatmaps are effective for displaying large datasets where traditional charts would become cluttered.
Heatmaps are invaluable for correlation analysis, showing relationships between variables; for geographic data, displaying regional patterns; and for time-series data, revealing cyclical patterns. Calendar heatmaps show activity patterns over time, correlation heatmaps reveal relationships between variables, and geographic heatmaps identify regional concentrations. The color gradient provides immediate visual feedback about data intensity.
When to Use a Heatmap
How to Create a Heatmap in 3 Steps
Upload Your Data
Copy and paste your data, upload a file (CSV, Excel, JSON), or type directly into our data table. CleanChart automatically detects your data structure and format.
Select Heatmap & Customize
Choose Heatmap from our chart type selector. Customize colors, labels, legend position, and styling. Preview changes in real-time as you adjust settings.
Export & Share
Download your Heatmap as PNG, SVG, or PDF for reports and presentations. Embed the chart directly on your website or share a link with your team.
Real-World Example
Showing website visitor activity patterns across hours and days of the week
Best Practices for Heatmaps
- 1.Keep labels clear and readable - use concise text that fits without overlapping
- 2.Use consistent colors throughout your visualization for easy pattern recognition
- 3.Include a descriptive title that explains what the chart shows
- 4.Ensure data is accurate and up-to-date before creating your chart
- 5.Consider your audience when choosing complexity and detail level
For more visualization guidelines, see resources from Tableau, Chartio, and the Interaction Design Foundation.
Create Heatmaps From Your Data
Import your data from any format and convert it to a beautiful Heatmap
Helpful Guides & Resources
Data Visualization for Beginners
Learn the fundamentals of creating effective charts
Chart Types Explained
When to use different types of charts for your data
Best Color Palettes for Charts
Choose colors that make your data stand out
Best Free Chart Makers (2026)
Compare top chart making tools and find the best fit
Frequently Asked Questions
How do I create a Heatmap for free?
CleanChart offers a free tier that lets you create Heatmaps. Simply upload your data, select Heatmap as your chart type, customize the design, and export.
What data formats are supported?
We support CSV, Excel (.xlsx), Google Sheets, JSON, and direct paste from clipboard. You can also connect to databases and APIs for live data.
Can I customize the Heatmap design?
Yes! You can customize colors, fonts, labels, axis formatting, legends, and more to match your brand or presentation needs.
What export formats are available?
Export your Heatmap as PNG (for presentations), SVG (for editing), or PDF (for reports). You can also embed interactive charts on websites.
Is my data secure?
Yes. CleanChart processes data securely and follows best practices for data protection. We don't store your data longer than necessary for chart creation.
Ready to Create Your Heatmap?
Start visualizing your data in minutes - no coding required.
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