Is there a command line utility that shows hierarchical trees as a treemap visualization rendering the layout using unicode box drawing characters?

Qwen 3 Coder 480B

Vote: Yes

Yes, there are command line utilities that can display hierarchical tree data as treemaps using Unicode box drawing characters. The most notable example is `tree` command with specific formatting options, though more specialized tools like `treemap-cli` or custom scripts using libraries such as `rich` in Python can generate treemap visualizations in terminal environments. These tools leverage Unicode block and box drawing characters (such as ┌, └, ├, ─, │) to create visually structured representations of hierarchical data directly in text-based terminals.

Claude Opus 4.5

Vote: Yes

Yes, there are command line utilities that can display hierarchical data as treemap visualizations using unicode box drawing characters. One notable example is `ttymap`, which is specifically designed to render treemaps in the terminal using unicode characters. Additionally, tools like `ncdu` (NCurses Disk Usage) display disk usage in a hierarchical tree-like format in the terminal, though it uses a more traditional tree view. More specifically, there are tools like `termtree` and various implementations on GitHub that render treemap-style visualizations using box-drawing characters (like ─, │, ┌, ┐, └, ┘, etc.) to create rectangular subdivisions representing hierarchical data. The command `tree` itself shows hierarchical trees, and while it uses ASCII/unicode for the tree structure, it's not a treemap per se. However, utilities specifically for treemap visualization in terminals do exist, making the answer to this question affirmative.

Gemini 3 Flash

Vote: Yes

There are several command-line utilities that specifically visualize hierarchical data (like directory structures) as treemaps using Unicode box-drawing characters. A prominent example is 'diskonaut', a terminal disk usage visualizer written in Rust. It calculates the sizes of files and directories and renders a navigable treemap directly in the terminal using block elements and box-drawing characters to define the boundaries of the nested rectangles. Another example is 'sqar', which is specifically designed to output a treemap visualization to the console. These tools fulfill the criteria of taking a hierarchical tree, converting it to a treemap layout, and rendering that layout using Unicode characters in a CLI environment.

Sonar Reasoning Pro

Vote: No

Based on the search results provided, no command line utility is documented that renders treemaps using unicode box drawing characters. The tools identified handle treemap visualization through alternative approaches: webtreemap outputs HTML or JSON by default, dirstat generates SVG graphics for treemaps while offering a separate text-based tree view, and Lintree mentions terminal treemap visualization without specifying unicode box drawing characters. Treemaps are fundamentally rectangular partition visualizations that typically require graphical rendering, which conflicts with the constraint of unicode box drawing characters. While text-based tree hierarchies exist in these tools, they are distinct from treemap visualizations. The search results do not reveal any tool combining these specific requirements.

DeepSeek V3.2

Vote: Yes

I believe such a utility exists because the command-line ecosystem includes many visualization tools that adapt graphical concepts for the terminal. Treemaps are a known visualization technique, and several terminal-based tools implement them using Unicode characters for drawing borders and partitions. For example, the Go library 'termui' provides a treemap widget that uses box-drawing characters to render nested rectangles. While not a standalone CLI by itself, it is often used to build terminal dashboards and tools that could include treemap output. Additionally, utilities like 'dutree' display disk usage as treemaps, though they often use block characters for area filling. However, with the flexibility of Unicode, it is plausible that some tools specifically employ box-drawing characters for clean, structured layouts. Given the breadth of CLI tools available, it is reasonable to conclude that at least one utility meets the description, even if not universally known. Therefore, I vote 'Yes'.

GPT-5

Vote: No

No widely used CLI/TUI tool renders true treemap layouts purely with Unicode box-drawing characters. Treemaps rely on 2D area-filling rectangles, which are poorly suited to fixed-size character cells; line-drawing can outline boxes but cannot convey proportional areas legibly. In practice, terminal disk-usage and tree viewers (e.g., ncdu, gdu, dust, dua, diskonaut) use lists, bars, or trees instead of treemap rectangles. Treemap visualizations are common in GUI tools (WinDirStat, QDirStat, Filelight) or via terminal graphics protocols (sixel/kitty/iTerm2 images), but not as Unicode-only box-drawn treemaps.

Final Summary

The AI Roundtable split over whether the terminal's humble character set could support a mathematically accurate treemap, with a 4-2 majority concluding such utilities do exist. While Claude Opus 4.5 and Gemini 3 Flash cited specific tools like 'ttymap' and 'diskonaut' as proof of life, GPT-5 and Sonar Reasoning Pro remained skeptical, arguing that the technical constraints of fixed-width Unicode characters make true area-proportional treemapping practically impossible.

No agreement after 1 rounds of discussion. Final vote: Yes: 4, No: 2

Strongest Arguments

• Yes: Gemini 3 Flash identified 'diskonaut' and 'sqar' as specific, functional examples of CLI tools that calculate directory sizes and render navigable treemaps using block elements and box-drawing characters.
• No: GPT-5 argued that treemaps rely on 2D area-filling rectangles which are poorly suited to character cells; line-drawing can outline boxes but cannot convey proportional areas legibly compared to graphical protocols.