# SlideFlow — Complete Product Documentation

## Product Overview
SlideFlow is a free, browser-based AI presentation editor developed by LIYON Global Enterprise. It solves a common problem: AI tools like Google NotebookLM and Gamma generate beautiful presentations, but the output is locked — text cannot be edited, fonts cannot be changed, and layouts cannot be adjusted.

SlideFlow converts these locked presentations into fully editable PowerPoint files through a 4-step process:
1. Upload: Drag and drop a PDF or PPTX file
2. AI Recognition: PP-OCRv5 (server-grade OCR) detects and recognizes all text regions
3. Edit: Modify text content, font, size, color, bold/italic/underline, alignment. Drag and resize text boxes freely.
4. Export: Download as editable PowerPoint (.pptx) or PDF

## Privacy & Security
All AI processing runs entirely in the user's browser using ONNX Runtime Web (WebAssembly). No files are uploaded to any server. AI models are downloaded once from HuggingFace CDN and cached in the browser for subsequent use.

## Technical Capabilities
- **Text Recognition**: PP-OCRv5 server-grade ONNX models for Chinese, English, and multilingual OCR
- **AI Inpainting**: LaMa deep learning model for seamless text removal and background reconstruction
- **Smart Editing**: Only modified text regions are processed — unmodified areas remain untouched
- **Dual Export**: PowerPoint (editable text boxes) and PDF (canvas-rendered) output formats
- **Keyboard Shortcuts**: Ctrl+Z undo, Ctrl+Y redo, Shift+drag for constrained movement, Alt+resize for center-anchored scaling

## Supported Input Formats
- PDF (rendered at 2x resolution using pdf.js)
- PPTX (images extracted via JSZip + relationship XML parsing)

## Target Users
- Professionals who use AI to generate presentations but need to customize them
- Teams that receive NotebookLM/Gamma outputs and need to add branding or edit content
- Anyone who needs to edit text in image-based or locked presentation files

## Frequently Asked Questions

### Is SlideFlow really free?
Yes. 100% free with no usage limits, no watermarks, and no account required.

### What happens to my files?
Your files never leave your device. All processing occurs in your browser using WebAssembly-based AI inference.

### What AI models does SlideFlow use?
- PP-OCRv5 (PaddlePaddle) for text detection and recognition
- LaMa (Large Mask Inpainting) for seamless text removal

### Can I use SlideFlow offline?
After the first use (which downloads AI models ~200MB), the models are cached in your browser. Subsequent uses work without re-downloading, though an internet connection may be needed for the initial model download.

### Who built SlideFlow?
SlideFlow is developed by LIYON Global Enterprise, founded by Theone Lin. LIYON specializes in enterprise AI solutions including custom document processing, white-label integration, and on-premise deployment.

## Company Information
- **Company**: LIYON Global Enterprise
- **Founder**: Theone Lin
- **Website**: https://liyoncso-theone.github.io/Liyon-Global/
- **LinkedIn**: https://www.linkedin.com/in/theone-lin/
- **Product URL**: https://slideflow-ch3.pages.dev/

## Enterprise Services
LIYON Global Enterprise offers:
- Custom AI document processing solutions
- White-label integration of SlideFlow engine
- RESTful API development for system integration
- On-premise deployment for maximum data security

## Technology Stack
React 19, TypeScript, Vite, ONNX Runtime Web, PP-OCRv5, LaMa, pptxgenjs, jsPDF