DiagramForge

Private AI Diagram Generator

Free · In-App Purchases

Create professional diagrams from natural language or source code entirely on your device. Private, offline with no cloud processing. Create Professional Diagrams with Private On-Device AI DiagramForge transforms ideas, source code, and technical documentation into professional Mermaid diagrams—entirely on your Mac. Describe a system in plain English, paste source code, import a supported source file, or edit Mermaid directly. DiagramForge generates clean, editable diagrams while keeping your work private. Once your local AI model is installed, diagram generation works completely offline. No cloud AI. No project uploads. Your source code stays on your Mac. AI-Powered Diagram Generation Turn natural language into diagrams in seconds. Generate: • Sequence Diagrams • Flowcharts • Class Diagrams • State Diagrams • Entity Relationship (ER) Diagrams DiagramForge automatically validates Mermaid syntax before replacing your existing diagram, helping prevent accidental loss of work. Multiple Ways to Create Diagrams Choose the workflow that fits your project: • Describe your diagram in plain English • Paste source code • Import supported source-code and text files • Write Mermaid directly with live preview Supported source formats include: • Swift • Objective-C • C • C++ • C# • Java • Kotlin • JavaScript • TypeScript • Python • Go • Rust • PHP • HTML • CSS • JSON • XML • YAML • Markdown • Mermaid Built-In Mermaid Editor DiagramForge is also a complete Mermaid editor. Features include: • Live Preview • Syntax validation • AI-powered Mermaid repair • AI diagram improvements • Multiple Mermaid themes • Starter templates • Diagram rename and organization • Automatic saving Offline AI DiagramForge runs AI locally using downloadable on-device language models. After installing a supported model: • AI generation works offline • No source code is sent to external servers • No cloud inference • No account required • No tracking of your projects Designed for developers who want privacy without sacrificing productivity. Professional Export Export diagrams for documentation, presentations, and technical specifications. Export formats include: • SVG • PNG Copy SVG directly to the clipboard for documentation, Git repositories, wikis, and Markdown. Starter Templates Jump-start new diagrams with professionally designed templates, including: • Login Sequences • REST API Flows • State Machines • Class Diagrams • Entity Relationship Diagrams • CI/CD Workflows DiagramForge Pro DiagramForge includes a generous free experience. Upgrade to DiagramForge Pro with a one-time purchase to unlock: • Unlimited on-device AI diagram generation • Unlimited AI Mermaid repair • Unlimited AI diagram improvements • Future Pro features and premium local AI models No subscription. No recurring fees. Your Pro purchase unlocks the complete DiagramForge experience on your Apple account. Built for Apple Silicon DiagramForge is designed specifically for modern Macs and takes advantage of local AI acceleration to generate diagrams quickly while keeping your data private. Whether you’re documenting software architecture, visualizing APIs, reverse-engineering source code, planning systems, or writing technical documentation, DiagramForge helps you create professional diagrams faster—without sending your work to the cloud.

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The developer, Carlos Chaparro, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Provider
    • Carlos Chaparro
    Size
    • 36.7 MB
    Category
    • Developer Tools
    Compatibility
    Requires iPadOS 26.5 or later.
    • iPad
      Requires iPadOS 26.5 or later.
    • Mac
      Requires macOS 26.3 or later.
    • Apple Vision
      Requires visionOS 26.5 or later.
    Languages
    English and 9 more
    • English, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © Carlos Chaparro
  • Privacy Policy
  • Licence Agreement

    • More by Carlos Chaparro