9 Built-in Color Schemes
Choose from Viridis, Plasma, Turbo, Reds, Blues, Greens, and more — or set custom min/max colors to match your brand.
Chart & Visualization Tools
Build Heatmaps in Seconds
The free hexbin heatmap maker that turns your rows, columns, and values into a clear visual story. No design skills. No setup. Just your data.
Features
Everything You Need in a Heatmap Maker
Powerful configuration, beautiful output — built for speed.
Cell Value Overlays
Toggle numeric values directly on heatmap cells so readers never have to guess the exact figure behind a color.
Flexible Cell Layout
Adjust cell size, gap, border width, border radius, and font size to create exactly the density matrix you need.
Color Legend Control
Show or hide the color scale legend and position it at the top, bottom, left, or right of your heatmap.
Interactive Tooltips
Hover over any cell to see its row label, column label, and exact value — great for inspecting dense matrices.
AI-Powered Generation
Describe your data in plain English and let the AI draft a complete heatmap you can refine in real time.
Data input
Bring Your Data, Any Way You Like
Type It In
Enter row labels, column labels, and values directly into the interactive data table — no file needed.
Paste from Spreadsheet
Copy cells from Excel or Google Sheets and paste them straight into the heatmap maker.
Upload a File
Import a CSV or Excel file to populate your heatmap automatically, available on Pro plans.
Describe with AI
Tell the AI what data you want visualized and it will build a sample heatmap for you in seconds.
Share
Share Your Heatmap Anywhere
Download as Image
Export your heatmap as a high-resolution PNG or SVG for reports, slides, and social posts.
Copy a Share Link
Generate a shareable link so colleagues and clients can view your heatmap without signing in.
Embed on Your Site
Paste a simple embed code to display your live heatmap on any website or blog (Plus and above).
Add to Presentations
Drop the downloaded image into PowerPoint, Google Slides, or Notion in one click.
About MakeCharts Heatmap Maker
MakeCharts is a free online chart maker built for speed and clarity. The hexbin heatmap maker lets you go from raw numbers to a polished, color-coded matrix in minutes. Whether you are plotting sales performance, survey results, or correlation data, you get full control without the complexity.
<2 minTime to first heatmap
9+Color schemes available
10k+Charts created monthly
12+Languages supported
FreePrice to start
Workflow
How to Make a Heatmap
Enter Your Data
Add row labels, column labels, and numeric values in the data table — or let AI generate sample data for you.
Choose a Color Scheme
Pick one of 9 built-in palettes or set custom colors for your minimum and maximum values.
Configure Display Options
Turn on cell value labels, adjust font sizes, set border styles, and position your color legend.
Export and Share
Download a high-resolution image, copy a share link, or embed the heatmap on your site.
Use cases
Who Uses This Heatmap Maker
Quarterly Performance Matrices
Reveal which products, regions, or reps are over- or under-performing across time periods at a glance.
Correlation and Feature Analysis
Visualize correlation matrices, confusion matrices, or feature importance grids to surface hidden relationships fast.
Student and Class Performance
Map assessment scores across subjects and students so educators can spot learning gaps and strengths instantly.
Feature Usage and Engagement
Plot feature usage frequency across user segments or time slots to prioritize your product roadmap with real data.
Templates
Start with professionally designed templates
Weight Conversion Matrix Heatmap — Multi‑Unit clarity in one viewheatmap
Build a weight conversion matrix heatmap in seconds. Compare mg, g, kg, oz, lb, and t with clear colors. Share, embed, and export instantly.
Calendar Heatmap Template: Reveal Activity Patterns at a GlanceheatmapVisualize activity patterns across months and weekdays with this calendar heatmap template. Spot trends, peak days, and seasonal shifts instantly.
Heatmap Template for Weekly Activity PatternsheatmapVisualize activity intensity across days and hours with this heatmap template. Spot peak times and patterns at a glance. Free, no sign-up needed.
Correlation Heatmap TemplateheatmapVisualize relationships between economic variables with a free correlation heatmap template. Spot patterns instantly with color-coded cells.
Product Engagement Heatmap TemplateheatmapVisualize weekly product feature engagement with a heatmap. Spot usage patterns, peak days, and low-traffic areas to prioritize product decisions.
Website Traffic Heatmap TemplateheatmapVisualize website traffic patterns across pages and days with this heatmap template. Spot peak hours, low-engagement days, and optimize your content strategy.
Related Tools
Create similar charts with these tools
Heatmap for Tone Intensityheatmap
Create a heatmap that compares word tone intensity in seconds. Free online, fully customizable colors, labels, and legend. Show values as % and export or embed easily.
Create Heatmaps InstantlyheatmapCreate stunning heatmaps in minutes with our free Heatmap Creator. Visualize data intensity, patterns, and correlations instantly. No design skills needed.
Free Heatmap MakerheatmapCreate stunning heatmaps in minutes. Our free heat map maker lets you visualize data density, patterns, and correlations with customizable colors and layouts.
Free Correlation Heatmap MakerheatmapCreate correlation heatmaps instantly. Map data relationships with color-coded cells, custom schemes, and AI generation. Free, no signup required.
Comparison
AI Heatmap Maker vs. Manual Methods
See why teams switch from spreadsheets and design tools to MakeCharts.
MakeCharts Heatmap Maker
- Ready-to-use hexbin heatmap in under two minutes
- Color scheme updates live as you tweak any setting
- Built-in hover tooltips — no code or plugins required
- One-click PNG or SVG export at high resolution
- Share with a link or embed on any website instantly
- AI generates a draft heatmap from a plain-English description
Spreadsheets & Design Tools
- Conditional formatting is tedious to configure and breaks on data changes
- Color scales reset or break when rows or columns are added
- No interactive tooltips without complex scripts or add-ons
- Exporting a clean, shareable image takes multiple manual steps
- Sharing requires sending a file or granting edit access to the sheet
- No AI assistance to generate, label, or refine the visualization
FAQ
Frequently Asked Questions
What is a hexbin heatmap maker?
A hexbin heatmap maker is an online tool that turns grid data — rows, columns, and numeric values — into a color-coded matrix where intensity is represented by color shade. MakeCharts supports both standard rectangular heatmaps and density-style visualizations with 9 built-in color schemes, making it easy to reveal patterns in any dataset.
Is this heatmap generator really free?
Yes. You can create, customize, and download heatmaps at no cost on the Free plan — no sign-up required. Paid plans unlock more AI credits, SVG exports, embed codes, and file upload features for larger workflows.
How do I make a heatmap from a spreadsheet?
Copy the cells from your Excel or Google Sheets file and paste them into the data table in MakeCharts. The tool maps your rows, columns, and values automatically. Pro users can also upload a CSV or Excel file directly to skip manual entry.
What color schemes does the heatmap maker support?
MakeCharts includes 9 built-in palettes: Reds, Blues, Greens, Oranges, Purples, Greys, Viridis, Plasma, and Turbo. You can also enable custom colors and pick exact shades for the minimum and maximum cell values to match your brand or report style.
Can I show the numeric values inside heatmap cells?
Yes. Toggle 'Show values in cells' in the Display Settings panel to overlay each cell with its exact number. You can control the value font size independently from the label font size for precise readability.
How do I create a correlation heatmap?
Enter your variable names as both row and column labels, then fill in the correlation coefficients as values. Choose a perceptually uniform scheme like Plasma or Viridis to make gradient differences clear. Enable tooltips so viewers can inspect exact coefficients on hover without cluttering the grid with numbers.
Can I use the AI to build a heatmap for me?
Yes. Every account includes free AI credits. Type a description of your data — for example, 'quarterly revenue for four products across four quarters' — and the AI will generate a complete heatmap. You can then edit the data, colors, labels, and layout manually to refine it.
How do I embed a heatmap on my website?
On Plus and higher plans, MakeCharts generates an embed code you can paste into any HTML page or CMS. The heatmap renders responsively and reflects any updates you make to the source chart.
What file formats can I export from the heatmap maker?
Free users can export PNG images. Starter and higher plans add SVG export for infinitely scalable graphics ideal for print or large displays. Pro and above can also import CSV and Excel files to populate the heatmap automatically.
Does the heatmap maker work on mobile devices?
Yes. MakeCharts is fully responsive and works on smartphones and tablets. The configuration panel and chart preview stack vertically on smaller screens so you can build and share heatmaps on the go without losing any features.
Built for Everyone
- No design skills or data science background required
- Works in 12+ languages across the full interface
- Accessible on any device — desktop, tablet, or phone
- Free tier with no sign-up so you can start immediately
- Plain-language controls that make sense the first time you use them
- AI assistance for users who are unsure which color scheme or layout to choose
Your Data, Your Control
- Your chart data is used only to render your visualization
- We do not sell or share your data with third parties
- You can delete your account and all associated data at any time
- Charts you keep private are not indexed or shared publicly
- No tracking pixels or third-party ad networks inside the editor
Start now
Ready to Build Your Heatmap?
Join thousands of analysts, educators, and designers who create heatmaps with MakeCharts every day.
- No sign-up required
- Free forever plan
- 9 color schemes
- AI-powered generation
- Export as PNG or SVG
- Share with a link
Works with sales data, survey results, correlation matrices, and more.