PDFino AI PDF Editor
A modern AI-powered PDF editor that allows users to merge, split, compress, convert, organize, protect, unlock, watermark, rotate, and manage PDF files with a beautiful, responsive interface.
Overview
PDFino is a comprehensive web-based PDF utility suite designed to streamline document workflows without requiring heavy desktop software. Built primarily for students, professionals, and small businesses, the platform offers fast, secure, and intuitive PDF manipulation tools. The main objective was to create a privacy-first, high-performance editor that processes documents directly in the browser wherever possible, minimizing server round-trips and ensuring maximum security for sensitive user data.
System Architecture
User Action
Browser UI interaction
Web Worker
Off-thread PDF parsing
Edge API
AI Analysis Routing
Supabase
Auth & Rate Limiting
Client Render
Blob URL generation
Challenges & Solutions
CLarge File Handling
Processing PDFs over 50MB in the browser caused severe main-thread blocking, leading to UI freezes and a poor user experience.
SWeb Workers Implementation
Migrated all heavy PDF manipulation tasks (using pdf-lib) to dedicated Web Workers. This kept the UI thread running at 60fps even during complex document processing.
CPrivacy & Security
Users are hesitant to upload sensitive legal or financial documents to third-party servers for simple tasks like merging or splitting.
SClient-Side First Processing
Engineered the platform to perform 90% of operations entirely in the browser. Documents only touch the server when utilizing specific AI analysis features.
CComplex State Management
Managing the state of multiple uploaded files, their individual processing statuses, and the final combined output required a robust architecture.
SCustom Zustand Store
Implemented a centralized, atomic state management solution using Zustand to track individual file progress, error boundaries, and output blobs efficiently.
Technology Stack
Frontend
- Next.js 14
- React 18
- TypeScript
- Tailwind CSS
- Framer Motion
- Lucide Icons
Backend
- Next.js Route Handlers
- Node.js
Database
- Supabase PostgreSQL
Authentication
- Supabase Auth
Libraries
- pdf-lib
- zod
- react-hook-form
Deployment
- Vercel Edge Network
Key Features
Role & Process
Full Stack Developer
- End-to-End System Architecture
- UI/UX Design & Prototyping
- Core PDF Engine Integration
- Performance Optimization
- Vercel Deployment & CI/CD