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CodeViz VS D2

Compare CodeViz VS D2 and see what are their differences

CodeViz

CodeViz builds a visual map of your codebase for faster understanding and navigation. Engineers spend a fraction of time actually typing code — we're fixing that.

Rating
0 reviews
Alternatives Is it good?
D2

Modern diagram scripting language to turn text to diagrams

Rating
0 reviews
Alternatives Is it good?
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Which is more popular?

Based on our record, D2 seems to be more popular. It has been mentioned 4 times since March 2021.

social mentions
0 vs 4
Wireframing popularity
100% vs 0%
alternatives listed
13 vs 37

Base details

Website, pricing, platforms and company facts side by side.

CodeViz
D2
Website codeviz.ai github.com
Pricing
Official pricing
—
Listed in
Diagrams Flowcharts Wireframing Flow Charts And Diagrams AI +2
Diagrams Web Frameworks Open Source Developer Tools +1

Analysis

An editorial look at what each product does well and who it suits.

CodeViz
D2

Overall verdict

  • CodeViz is a helpful tool for developers who want to understand complex codebases quickly through visual diagrams and maps, making onboarding and code comprehension significantly easier.

Why this product is good

  • Automatically generates visual diagrams and maps of your codebase to reveal structure and dependencies
  • Speeds up onboarding for new developers joining unfamiliar projects
  • Helps identify architecture patterns, bottlenecks, and relationships between components
  • Reduces the time spent manually tracing code flow and understanding legacy systems
  • Supports better communication among teams by providing shared visual references

Recommended for

  • Developers onboarding onto large or unfamiliar codebases
  • Engineering teams maintaining complex or legacy software
  • Technical leads who need to document and communicate system architecture
  • Consultants and contractors who frequently work across different projects
  • Open-source contributors trying to understand a new repository quickly

Overall verdict

  • D2 is an excellent modern diagramming tool that lets you create diagrams from plain text, offering a clean syntax, attractive automatic layouts, and strong developer-friendly integration, making it a top choice for text-based diagramming.

Why this product is good

  • Uses a simple, readable declarative syntax that makes diagrams easy to write and version-control
  • Produces polished, professional-looking diagrams with multiple layout engines (Dagre, ELK, TALA)
  • Open source and actively maintained with a growing community and ecosystem
  • Supports advanced features like themes, animations, sketch-style rendering, and interactive tooltips
  • Integrates well with developer workflows, CI/CD pipelines, and documentation-as-code setups
  • Offers both a CLI and a hosted playground for quick experimentation

Recommended for

  • Software engineers and architects documenting system designs
  • Teams practicing diagrams-as-code and version-controlled documentation
  • Technical writers who want reproducible, maintainable diagrams
  • Developers who prefer text-based workflows over drag-and-drop editors
  • Open source projects needing embeddable architecture and flow diagrams

Videos

Walkthroughs and reviews on video.

CodeViz 1 video + Add
D2 3 videos + Add

Masters Thesis: CodeViz - Visualization of Data Structures

D2 Review | If John Carpenter's The Thing Was A Soap Opera

More videos

  • - Review: Gait D2 Series
  • - Classic Game Room - D2 review for Sega Dreamcast

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
CodeViz
D2
100% 100%
Wireframing
0% 0%
0% 0%
Developer Tools
100% 100%
51% 51%
Diagrams
49% 49%
0% 0%
Open Source
100% 100%

User comments

Share your experience with using CodeViz and D2. For example, how are they different and which one is better?

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

CodeViz 0 mentions
D2 4 mentions

Tracking CodeViz since Aug 2025.

  • Exploring Goja: A Golang JavaScript Runtime
    I work on the D2 project ([0]) and we switched from other Javascript runners (v8go) to Goja. Using a JS runtime with a dependency on cgo means your Go program loses the (huge) benefit of cross-compiling to different architectures, since... - Source: Hacker News / about 2 years ago
  • I want to contribute to open source but don't know where to start
    You're welcome in D2! I maintain a Text to diagram language, released a few months ago, 13k+ stars, I'm actively tagging issues that are good first issues, clean well-tested Go, and I'm happy to help you get that first merge in. Feel... Source: over 3 years ago
  • Concrete Diagramming, a Lightweight Alternative to C4
    Right. It's okay to leave written documentation on SaaS (e.g. Notion), because the text is the artifact. If they're shutting down, or I don't like them anymore, I just move the text. But if Ilograph goes down, all I have is... - Source: Hacker News / over 3 years ago

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Alternatives to CodeViz and D2

When comparing CodeViz and D2, you can also consider the following products.

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