What diagram formats does Diagramming AI support?

It supports Mermaid, PlantUML, Graphviz, and D2. It can also generate infographics using an Excalidraw integration.

Can I edit diagrams manually after they are generated?

Yes, you can edit the code directly in the built-in editors or use the AI chat to request specific changes via natural language.

How does the AI Error Resolution work?

The system automatically detects syntax errors in the diagram code, interprets the error message, and applies corrections to ensure the diagram renders correctly.

Can I convert an existing image into a diagram?

Yes, the Lite and Pro plans include 'Image to Diagram' and 'URL to Diagram' features to convert existing assets into editable code.

Is there a limit to how much text I can input?

The Free and Lite plans allow up to 3,000 characters, while the Pro plan increases this limit to 20,000 characters for complex system descriptions.

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Diagrams

Freemium

Diagramming AI

Instantly design UML, workflows, and infographics with AI. Support for Mermaid, PlantUML, and D2 with automated error fixing and smart editing via natural language.

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Rating

Reviews

Upvotes

4 months ago

Listed

Diagrams

UML

Workflows

Software Architecture

Mermaid

PlantUML

Flowcharts

Tool information

Provider

Diagramming AI

Platforms

Web

Languages

English

Added to directory

4 months ago

Last updated

2 months ago

Rating

Not available

Pricing

Freemium

About Diagramming AI

What the tool does and who it's for

Diagramming AI is a specialized platform designed to automate the creation and management of technical diagrams including UML, workflows, and infographics. By leveraging a multi-engine AI approach (including GPT-5.4-mini, Gemini-3.1-Flash-Lite, and Claude-4.5-Haiku), users can generate structured diagrams from natural language prompts, code snippets, or even images and URLs. The platform supports multiple syntax formats such as Mermaid, PlantUML, Graphviz, and D2. It features a unique AI-powered error resolution system that automatically fixes syntax errors in diagram code, a smart editing chat for iterative refinements, and a comprehensive template library to jumpstart complex projects like sequence diagrams, Gantt charts, and ERDs.

Key capabilities

AI-Powered Diagram Generation: Create complex visuals from text prompts or pasted notes.

Multi-Engine Support: Access models like GPT-5.4, Gemini-3.1, and Claude-4.6 for diagramming.

AI Error Resolution: Automatically analyzes and fixes syntax errors in Mermaid or PlantUML code.

Image/URL to Diagram: Convert existing images or web content into editable diagram structures.

Live Chat Refinement: Use an integrated chat interface to suggest edits and update diagrams in real-time.

Multiple Export Formats: Support for Mermaid, PlantUML, Graphviz, and D2 editors and exports.

Project Storage: Organize diagrams into projects with versioning and note-saving capabilities.

Infographic Integration: Transform ideas into hand-drawn style infographics via Excalidraw integration.

Public Sharing: Generate read-only public links for quick review and collaboration.

Pricing

Freemium — plans below

Free

10 Credits
2 Projects
3 Diagrams per project
3,000 input characters
Access to mini/lite AI models

Lite

$3/month

250 Credits
Unlimited Projects
Unlimited Diagrams
URL to Diagram
Image to Diagram

Pro

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