Free Diagram Generator
Hey HN, I built this tool because my personal diagramming workflow was broken, and I wanted to automate it. When creating diagrams, I have two conflicting needs. For logic and structure, I prefer Mermaid.js here. It’s deterministic, version-controllable, and lets me tweak the logic easily until it matches exactly what’s in my head. For aesthetics, I need the final result to look like a high-end infographic for presentations, which Mermaid (and standard tools) are bad at. Before Nanobanana Pro came out, AI image generation cannot generate good visual presentation for diagrams because it…
Free Diagram Generator launched on December 2, 2024 with 14 votes, #1,097 of 5,365 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 1 year on.
What it does
Create professional diagrams and flowcharts using natural language. Transform your ideas into visual representations instantly.
Type a description, get a professional diagram in seconds. 16+ types including flowcharts, ER diagrams and mind maps, 10+ visual styles, free to start, no signup. Export 2K/4K.
Transform your ideas into presentation-ready infographics with our free AI diagram generator. Our agent searches the web, grounds the facts, and renders a stunning visual in a minute. Our agent can generate any diagram types you want including flowcharts, ER diagrams, sequence diagrams, mind maps, etc. Our AI diagram maker delivers professional results from simple text prompts — no design skills required. Editable Mermaid or a 4K image — choose inside, switch anytime. Describe what you want to visualize — a topic, a process, a market. Our agent searches the web for fresh data, plans the layout, and renders a presentation-ready infographic in under a minute. For docs or git, the same chat…from diagram-generator.com
In the maker’s words, at launch
Hey HN, I built this tool because my personal diagramming workflow was broken, and I wanted to automate it. When creating diagrams, I have two conflicting needs. For logic and structure, I prefer Mermaid.js here. It’s deterministic, version-controllable, and lets me tweak the logic easily until it matches exactly…
Does a similar job
all alternatives →
Diagram as code tool with draggable customizationsOct 2025 · github.com · ▲266In the past I've used declarative diagram generation tools like Mermaid.js a lot for quickly drawing up things but for presentations or deliverables I find that I have to then move the generated diagrams over to a tool like Lucidchart which allows full control of the organization and customization. Therefore I am now working on this to combine the benefits of both into just one tool which can do both functions. The project is certainly in the early stages but if you find yourself making architecture diagrams I'd love to hear your thoughts on the idea or even a Github issue for a feature…
GUI for editing Mermaid class diagrams2025 · docs.mermaidchart.com · ▲230
Beauty DiagramMay 2026 · beauty-diagram.com · ▲98Mermaid online live editor that beautifies flowcharts and activity diagrams — also supports PlantUML and draw.io. Live preview, one-click beautify, clean SVG / HD PNG export.
Line9 – A Mermaid rendering engine with its own layoutAug 2026 · line9.ai · ▲87Line9 is a new rendering engine for Mermaid flowchart diagrams that aims to remove the need for manual adjustment of layout. Mermaid is a popular text-based language for describing multiple types of diagrams. Several Mermaid rendering engines already exist. Most, like the original mermaid.js, use Dagre or ELK graph drawing libraries to automatically lay out their diagrams. I’ve used Mermaid for the past four years but often recreated my flowcharts in a diagram editor so that I could modify the layout to something that better suited my needs. Use Line9 when you want an automatic flowchart…
More ai this month
the category →
Paintings by AI models: programs run through a simulation of oil paint.
AI · 22d ago · stillwet.art
FastRouter.ai▲364Route requests to the right LLM for cost, latency & quality
AI · 23d ago · fastrouter.ai
Source: Product Hunt launch ↗ · launch text quoted in part
