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Nano Tech Diagrams: Whiteboard Photos to Polished Diagrams with 28 Style Presets
· Daniel Rosehill

Nano Tech Diagrams: Whiteboard Photos to Polished Diagrams with 28 Style Presets

A multi-platform tool for creating and editing technical diagrams using Fal AI's Nano Banana 2 model — available as a desktop GUI, CLI, MCP server, and npm package with 28 style presets and 20 diagram types.

AI Image Generation Diagrams MCP Fal AI Developer Tools Open Source

Every technical team has the same problem: someone draws a great architecture diagram on a whiteboard, takes a photo, and that photo becomes the permanent documentation. It's crooked, the marker is fading, half the labels are illegible, and it looks terrible in any document.

Nano Tech Diagrams converts those whiteboard photos — or plain text descriptions — into polished, professional technical diagrams using Fal AI's Nano Banana 2 model. It's available as a desktop GUI, CLI tool, MCP server, and npm package.

Three Modes of Operation

  • Whiteboard Cleanup — Converts messy whiteboard photos into clean diagrams. Corrects perspective distortion, removes the physical whiteboard and markers, disambiguates handwriting, and applies a dictionary of technical terms for spelling accuracy.

  • Image-to-Image — Transform any existing image using a diagram type preset, custom prompt, style preset, or any combination. Take a rough sketch and apply a blueprint aesthetic, or restyle an existing diagram into dark mode.

  • Text-to-Image — Generate diagrams from pure text descriptions. No input image needed. Describe what you want and pick a style.

28 Style Presets

Professional (6)

  • Clean & Polished — white background, clear hierarchy (default)

  • Corporate Clean — minimalist navy/grey, slide-ready 16:9

  • Hand-Drawn Polished — refined sketch aesthetic

  • Minimalist Mono — black and white Bauhaus

  • Ultra Sleek — hairline lines, Swiss design, maximum negative space

  • Blog Hero — soft gradient, brand-color accent, 16:9 blog ready

Creative (9)

  • Colorful Infographic — bold, vibrant, energetic

  • Comic Book — thick outlines, Ben-Day dots

  • Isometric 3D — modern SaaS aesthetic with depth

  • Neon Sign — glowing neon on dark brick

  • Pastel Kawaii — soft, bubbly, adorable

  • Pixel Art — 16-bit retro chunky pixels

  • Stained Glass — jewel tones with lead came lines

  • Sticky Notes — cork board, casual, collaborative

  • Watercolor Artistic — translucent washes, ink pen quality

Technical (7)

  • Blueprint — white/blue lines on deep blue engineering aesthetic

  • Dark Mode Technical — neon on dark, developer-friendly

  • Flat Material — Material Design, Google-style

  • GitHub README — optimized for markdown embedding

  • Photographic 3D — photorealistic objects, studio lighting

  • Terminal Hacker — phosphor green CRT scan-lines

  • Visionary Inspirational — cosmic gradient, glowing nodes, keynote aesthetic

Retro & Fun (5)

  • Chalkboard, Eccentric Psychedelic, Mad Genius, Retro 80s Synthwave, Woodcut

Language (2)

  • Bilingual Hebrew — English + Hebrew labels, RTL layout

  • Translated Hebrew — fully Hebrew, native speaker optimization

20 Diagram Type Presets

Infrastructure: Network Diagram, Cloud Architecture, Kubernetes Cluster, Server Rack / Data Center

Software: System Architecture, Microservices Map, API Architecture, Database Schema / ER Diagram

Process: Flowchart, Decision Tree, Sequence Diagram, State Machine, CI/CD Pipeline

Conceptual: Mind Map, Wireframe / UI Mockup, Gantt Chart / Timeline, Comparison Matrix, Org Chart / Hierarchy

Four Interfaces

  1. Desktop GUI (Python/PyQt6) — Drag-and-drop images, select styles, preview results, system tray integration. Right-click outputs to send them back for touchups. Available as a .deb package for Ubuntu/Debian.

  2. CLI (Python) — For scripting and batch processing. nano-tech-diagrams whiteboard.jpg --whiteboard --style blueprint

  3. MCP Server (TypeScript + Python) — Integrate with Claude Code and other MCP clients. Add with: claude mcp add nano-tech-diagrams -e FAL_KEY=your-key -- npx -y nano-tech-diagrams

  4. npm Package — Published as nano-tech-diagrams for programmatic use.

MCP Tools

The MCP server exposes five tools for Claude integration:

  • list_styles — all 28 styles with categories

  • list_diagram_types — all 20 diagram types with categories

  • whiteboard_cleanup — takes image path, style, dictionary words, format, resolution, aspect ratio

  • image_to_image — transform existing images with prompt, style, and diagram type

  • text_to_image — generate diagrams from text descriptions

Output Options

  • Formats: PNG (default), JPEG, WebP

  • Resolution: 0.5K, 1K (default), 2K, 4K

  • Aspect ratios: auto, 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9, 9:21

  • Variants: 1-4 different outputs per job

The repo is at github.com/danielrosehill/Nano-Banana-Tech-Diagram-Maker — published on npm as nano-tech-diagrams.