Treemap Chart

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

Budget and expense breakdowns by department

Market share distribution across companies or sectors

File system and storage usage by folder

Portfolio allocation across asset classes

Sales performance by product category and region

Website traffic by channel or content type

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

AI Treemap Generatortreemap

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Treemap Makertreemap

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Templates

Start with professionally designed templates

Treemap Template for Proportional Datatreemap

Visualize proportional data with a free treemap template. Compare sectors, categories, or budgets at a glance. Customize and download instantly.

Budget Allocation Treemap Templatetreemap

Visualize department budget distribution with a color-coded treemap. Customize categories and values to match your organization's specific budget.

Website Analytics Treemap: Visualize Traffic by Sectiontreemap

Visualize page views by section with a website traffic hierarchy treemap. Instantly see which pages and sections drive the most traffic and performance.

Stock Portfolio Treemap — Visualize Asset Allocationtreemap

Visualize your investment portfolio breakdown with a treemap. See asset allocation at a glance — free, fully customizable, and no sign-up needed to get started.

Visualize Disk Space Usage with a Treemaptreemap

Visualize your storage breakdown instantly with this disk space treemap template. See which files and folders use the most space at a glance.

Visualize Company Headcount by Departmenttreemap

Visualize company headcount by department with a treemap. See employee distribution across Engineering, Sales, HR, and more at a glance. Free and customizable.

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Create Your Treemap Chart with AI

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