Treemap Chart
Data
| Name | Value | Color | |
|---|---|---|---|
General settings
Display settings
Free Online Treemap Chart Maker
What is a Treemap Chart?
A treemap chart displays hierarchical data as nested rectangles, where each rectangle's area is proportional to its value. It's the clearest way to show part-to-whole relationships across many categories at once — think revenue split by product line, storage usage by folder, or market cap by sector. Unlike pie charts, treemaps handle dozens of segments without becoming cluttered, making them the go-to choice when you need both hierarchy and proportion in a single view.
Key Features
Size-Encoded Values
Each rectangle's area is directly proportional to its value, so relative magnitude is instantly visible without reading a single number.
Nested Hierarchy
Group items into parent categories and sub-categories so viewers can navigate from the big picture down to individual segments.
Color Coding
Assign distinct colors per category or use a gradient to highlight a second dimension — like growth rate alongside market share.
Flexible Label Options
Show the item name, its value, or both inside each block. Adjust font size and position to keep dense treemaps legible.
Instant AI Generation
Describe your data in plain text and MakeCharts builds a ready treemap in seconds — no spreadsheet required.
Export and Embed
Download your treemap as a PNG or SVG, or grab an embed code to drop it directly into a webpage or presentation.
Best For
When to Use
- You have more than 6–7 segments and a pie chart would become unreadable
- Your data has a natural parent-child hierarchy (sector → company, department → team)
- You need to compare relative sizes at a glance across many items
- Part-to-whole proportions matter and every item should be visible
- You want to highlight which categories dominate without a ranked list
Common Mistakes
- !Including too many tiny segments — items under ~1% of the total become unreadable slivers
- !Skipping a sort order so the largest blocks are scattered instead of grouped for quick scanning
- !Using nearly identical colors for adjacent blocks, making it hard to tell categories apart
- !Setting label font sizes too small for dense treemaps — hide labels on very small blocks instead
- !Confusing treemaps with heatmaps: treemaps encode quantity in area, not color intensity
- !Omitting units from value labels, leaving viewers to guess whether numbers are dollars, percentages, or counts
Related Tools
Create similar charts with these tools