I reached the same conclusion after comparing diagram-as-code tools — D2 feels cleaner and more expressive than Mermaid.

I’ve been working on an AI diagramming tool built around D2: https://aidiagrammaker.com/ You describe a system in plain English, and it generates architecture diagrams, flowcharts, and sequence diagrams in D2.

Edits can be made either directly in the D2 code or via a context-aware editor.

Hi HN,

I’m the creator of AI Diagram Maker — a tool that helps developers instantly create architecture diagrams, flowcharts, and sequence diagrams just by describing them in plain English.

You type something like:

“User logs in → system validates credentials → show dashboard”

and it automatically generates a clean, editable diagram using the D2 diagram-as-code format under the hood.

No drag-and-drop, no manual layout tweaking. You can edit the generated diagram, export it, or refine it further with natural-language commands like “make this a sequence diagram” or “add a database node between API and UI.”

I created this because we can now leverage the power of LLMs to make diagram creation as productive and intuitive as vibe coding — while avoiding the usual pain points of traditional diagramming tools.

I’d love honest feedback from the community: • Is this something you’d actually use? • What’s missing or frustrating? • How can this be more useful for real-world dev/design workflows?

Appreciate any thoughts, critiques, or suggestions — good or bad.

I’ve always loved watching long-form interviews and listening to deep-dive podcasts, but one thing frustrated me—going back to find key insights was a hassle. I’d spend so much time scrubbing through videos, trying to remember where I heard a great point or an important recommendation.

So I built VideoToWisdom.com – a tool that extracts key takeaways from YouTube videos, lets you ask questions about the content, and makes it easy to organize insights for future use.

It’s been superuseful for me in cases like: • Stock analyses – Quickly pulling out key trends and investor insights • Book recommendations – Instantly listing all books mentioned in a video • Product reviews – Summarizing pros, cons, and key features without watching an hour-long review

One feature I built with power users in mind is the ability to export notes to Obsidian, making it easy to search and revisit key insights.

I’d love to hear your thoughts! Does this solve a problem you’ve had? What would make it more useful for you?

Thanks for the suggestion. I updated it.