9 Color Schemes
Choose from Viridis, Plasma, Turbo, Reds, Blues, Greens, and more to match your brand or highlight specific patterns.
Chart & Visualization Tools
Free Correlation Heatmap Maker
Turn raw data into a color-coded heatmap in seconds. Spot correlations, outliers, and trends at a glance — no design skills or coding required.
Features
Everything You Need in a Heatmap Maker
Purpose-built controls for building clear, accurate correlation heatmaps
Custom Min/Max Colors
Set your own low and high value colors for precise, branded heatmaps that communicate exactly what you intend.
Cell Value Labels
Optionally display the numeric value inside each cell so readers can see exact figures alongside the color encoding.
Color Legend Control
Add a color scale legend in any position — top, bottom, left, or right — to help readers interpret the heatmap instantly.
Adjustable Cell Size and Gap
Fine-tune cell dimensions, border radius, and spacing to create dense or spacious heatmaps that fit your layout perfectly.
AI-Powered Generation
Describe your dataset in plain language and let the AI build a heatmap with the right structure, labels, and color mapping.
Data input
Bring Your Data Any Way You Like
Type It In
Enter row labels, column labels, and values directly into the simple data table.
Paste from Spreadsheet
Copy cells from Excel or Google Sheets and paste them straight into MakeCharts.
Upload a File
Import CSV or Excel files with your matrix data for instant heatmap generation (Pro).
Describe with AI
Tell the AI what correlations to visualize and get a ready-made heatmap in seconds.
Share
Share Your Heatmap Everywhere
Download PNG or SVG
Export crisp, high-resolution heatmap images ready for slides, reports, and publications.
Share a Link
Generate a shareable link so colleagues and clients can view your heatmap instantly.
Embed on Your Site
Add your heatmap to any webpage with a simple embed code that stays up to date.
Use in Presentations
Drop your heatmap into PowerPoint, Google Slides, or Keynote with a single download.
About MakeCharts
MakeCharts turns raw data into clear, professional visuals in minutes. Our heatmap maker is part of a suite of 30+ chart types built for speed and simplicity. No installation, no design skills, no friction — just your data and a polished chart.
<2 minTime to first heatmap
9+Color schemes available
10k+Charts created
12+Languages supported
$0Cost to start
Workflow
From Data to Heatmap in 3 Steps
Enter Your Data
Add row labels, column labels, and numeric values to the data table, or paste directly from a spreadsheet.
Choose Your Colors
Select a color scheme like Viridis or Reds, then adjust cell size, gaps, and whether to show value labels.
Download or Share
Export your heatmap as a PNG or SVG, copy a shareable link, or embed it directly in your website.
Use cases
Who Uses a Correlation Heatmap Maker
Track Performance Across Products and Periods
Visualize how revenue, margin, or growth varies across product lines and time periods with a single glance at color-coded cells.
Visualize Correlation Matrices Instantly
Plot correlation coefficients between variables to identify multicollinearity, strong predictors, and surprising relationships in your dataset.
Spot Channel and Campaign Patterns
Map engagement metrics across campaigns, audiences, and time periods to find what combinations drive the best results.
Communicate Research Findings Clearly
Present survey results, exam score distributions, or experimental data in a format that audiences understand without statistical training.
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.
Build Heatmaps in SecondsheatmapBuild professional hexbin heatmaps instantly. Reveal density patterns, correlations, and intensity across rows and columns — 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.
Comparison
MakeCharts vs. Traditional Heatmap Tools
See why teams switch from spreadsheets and BI tools to MakeCharts
MakeCharts Heatmap Maker
- Heatmap ready in under 2 minutes
- 9 color schemes plus fully custom min/max colors
- AI generates heatmaps from a plain-language description
- One-click PNG or SVG download and embed code
- Full control over cell size, gap, borders, and labels
- Free to use — no signup or installation required
Spreadsheets and BI Tools
- Hours spent configuring conditional formatting rules
- Rigid color schemes with no easy customization
- No AI to generate heatmaps from a plain description
- Exporting requires screenshots or complex workflows
- Limited control over cell size, labels, and layout
- Requires setup, licenses, or technical knowledge
FAQ
Frequently Asked Questions
What is a correlation heatmap maker?
A correlation heatmap maker is an online tool that turns numeric data into a color-coded grid where each cell's color represents a value magnitude. MakeCharts lets you build one in minutes without any design or coding skills — free and in your browser.
Is the heatmap generator free?
Yes — the core correlation heatmap maker is completely free with no signup required. You can create, customize, and download heatmaps at no cost. AI chart generation and CSV file uploads are available on paid plans.
How do I make a heatmap from a correlation matrix?
Enter your correlation coefficients as values with variable names as both row and column labels. Choose a color scheme like Plasma or set custom min/max colors to clearly show positive and negative correlations across the matrix.
What color schemes does the heatmap maker support?
MakeCharts includes 9 preset color schemes: Viridis, Plasma, Turbo, Reds, Blues, Greens, Greys, Oranges, and Purples. You can also enable custom colors to set your own minimum and maximum value colors for full brand control.
Can I show numeric values inside heatmap cells?
Yes. In the Display Settings panel, toggle on 'Show values in cells'. You can also adjust the value font size to keep the heatmap readable at any cell size — useful when presenting exact figures alongside color encoding.
Can the AI generate a correlation heatmap for me?
Yes. Describe your data and what you want to visualize — for example, 'quarterly sales by product for 4 products over 4 quarters' — and the AI creates a ready-made heatmap. Free AI credits are included with every account.
What file formats can I export my heatmap as?
You can download your heatmap as a high-resolution PNG or scalable SVG. PNG is ideal for slides and documents, while SVG is perfect for web use or further editing in design tools.
Can I embed a heatmap on my website?
Yes. Plus and Pro plans include embed codes. Copy the snippet and paste it into any webpage to display a live heatmap without separately hosting images.
What is the difference between a heatmap and a correlation matrix?
A correlation matrix is a table of coefficient values between variables. A heatmap is the visual representation of that matrix, using color intensity to make patterns immediately visible without reading individual numbers. Our correlation heatmap maker converts any matrix into a clear visual in seconds.
Does MakeCharts support large datasets in heatmaps?
MakeCharts handles typical heatmap sizes well for web-based visualization. For larger matrices, uploading a CSV file via the Pro plan is the fastest way to populate the data table and render your heatmap.
Built for Everyone
- No design background needed — intuitive controls guide you step by step
- Works on any device: desktop, tablet, or mobile
- Available in 12+ languages for global teams and classrooms
- Free tier with no signup so anyone can start immediately
- Simple enough for students, powerful enough for data scientists
Your Data, Your Control
- Your chart data is used only to render your heatmap
- We do not sell or share your data with third parties
- You control what you publish or share publicly
- Download your heatmap and delete your data at any time
- No account required to create and download a heatmap
Start now
Build Your Correlation Heatmap Now
Free, instant, no signup required
- Free forever tier
- 9 color schemes
- AI-powered generation
- PNG and SVG export
- No signup needed
- Works in your browser
Free to use — no signup needed