yq-pdf
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High-performance PDF manipulation library with native processing capabilities. Supports encryption, decryption, merging, splitting, watermarking, optimization, and comprehensive PDF operations with both file and buffer support.
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[](https://badge.fury.io/js/yq-pdf)
[](https://opensource.org/licenses/MIT)
[](https://www.typescriptlang.org/)
[](https://nodejs.org/)
**High-Performance PDF Manipulation Library for Node.js and TypeScript**
yq-pdf is an extremely fast, feature-rich PDF processing library that leverages native processing capabilities to deliver exceptional performance. Built for modern applications requiring robust PDF manipulation with both file and buffer support.
## Table of Contents
- [🚀 Performance](#-performance)
- [✨ Features](#-features)
- [📦 Installation](#-installation)
- [🔧 Quick Start](#-quick-start)
- [📚 API Reference](#-api-reference)
- [Core Operations](#core-operations)
- [Security Operations](#security-operations)
- [Content Extraction](#content-extraction)
- [Document Manipulation](#document-manipulation)
- [Metadata Operations](#metadata-operations)
- [Utility Functions](#utility-functions)
- [💡 Usage Examples](#-usage-examples)
- [🔄 Input/Output Flexibility](#-inputoutput-flexibility)
- [⚡ Performance Benchmarks](#-performance-benchmarks)
- [🛠️ Advanced Configuration](#️-advanced-configuration)
- [🤝 Contributing](#-contributing)
- [📄 License](#-license)
- [📞 Support](#-support)
## 🚀 Performance
yq-pdf delivers **exceptional performance** through native processing capabilities:
- **⚡ Ultra-fast processing**: Up to 10x faster than traditional PDF libraries
- **🔄 Concurrent operations**: Handle multiple PDFs simultaneously
- **💾 Memory efficient**: Optimized memory usage for large documents
- **📊 Scalable**: Process thousands of documents without performance degradation
- **🎯 Zero-copy operations**: Direct buffer manipulation for maximum efficiency
## ✨ Features
### 🔐 Security & Encryption
- **AES-256 encryption/decryption** with user and owner passwords
- **Permission controls** for printing, copying, and editing
- **Password validation** and security level detection
### 📄 Document Operations
- **Merge multiple PDFs** with customizable options
- **Split PDFs** by page ranges or individual pages
- **Extract specific pages** with flexible selection
- **Rotate pages** with precise angle control
- **Resize and crop pages** with coordinate precision
### 🎨 Content Manipulation
- **Add watermarks** with positioning and styling options
- **Remove watermarks** intelligently
- **Extract images** in original quality
- **Extract fonts** and typography information
- **Optimize file size** without quality loss
### 📎 Attachment Management
- **Add attachments** to PDF documents
- **Extract attachments** to specified directories
- **Remove specific attachments** by name
- **List attachment metadata**
### 📊 Information & Validation
- **Comprehensive PDF information** extraction
- **Document validation** and integrity checks
- **Metadata manipulation** (title, author, subject, keywords)
- **Page layout and mode detection**
### 🔧 Advanced Features
- **Buffer and file support** for maximum flexibility
- **TypeScript definitions** for enhanced development experience
- **Promise-based API** for modern async/await patterns
- **Comprehensive error handling** with detailed messages
## 📦 Installation
```bash
npm install yq-pdf
```
```bash
yarn add yq-pdf
```
```bash
pnpm add yq-pdf
```
## 🔧 Quick Start
```typescript
import { YqPDF } from 'yq-pdf';
const yqPdf = new YqPDF();
// Encrypt a PDF
const encryptResult = await yqPdf.encrypt('input.pdf', 'output.pdf', 'userPassword');
// Merge multiple PDFs
const mergeResult = await yqPdf.merge('merged.pdf', 'file1.pdf', 'file2.pdf', 'file3.pdf');
// Extract pages
const extractResult = await yqPdf.extract('input.pdf', 'output.pdf', '1-5,10,15-20');
// Add watermark
const watermarkResult = await yqPdf.watermark('input.pdf', 'output.pdf', 'CONFIDENTIAL');
```
## 📚 API Reference
### Core Operations
#### `YqPDF` Class
Main class providing all PDF manipulation capabilities.
```typescript
const yqPdf = new YqPDF();
```
### Security Operations
| Method | Description | Input Types | Output Types |
|--------|-------------|-------------|--------------|
| `encrypt()` | Encrypt PDF with password protection | File/Buffer | File/Buffer |
| `decrypt()` | Decrypt password-protected PDF | File/Buffer | File/Buffer |
| `validate()` | Validate PDF integrity and structure | File/Buffer | ValidationResult |
### Content Extraction
| Method | Description | Input Types | Output Types |
|--------|-------------|-------------|--------------|
| `extractImages()` | Extract all images from PDF | File | Directory |
| `extractFonts()` | Extract font information | File | Directory |
| `extractAttachments()` | Extract embedded attachments | File | Directory |
| `extract()` | Extract specific pages | File/Buffer | File/Buffer |
### Document Manipulation
| Method | Description | Input Types | Output Types |
|--------|-------------|-------------|--------------|
| `merge()` | Combine multiple PDFs | Files/Arrays | File |
| `split()` | Split PDF into separate files | File/Buffer | Files |
| `rotate()` | Rotate pages by specified angle | File/Buffer | File/Buffer |
| `resize()` | Resize pages to new dimensions | File/Buffer | File/Buffer |
| `crop()` | Crop pages to specified area | File/Buffer | File/Buffer |
### Metadata Operations
| Method | Description | Input Types | Output Types |
|--------|-------------|-------------|--------------|
| `setMetadata()` | Update PDF metadata | File/Buffer | File/Buffer |
| `info()` | Get comprehensive PDF information | File/Buffer | InfoResult |
| `properties()` | Get PDF properties | File | PropertiesResult |
### Utility Functions
| Method | Description | Input Types | Output Types |
|--------|-------------|-------------|--------------|
| `optimize()` | Optimize PDF file size | File/Buffer | File/Buffer |
| `watermark()` | Add text watermark | File/Buffer | File/Buffer |
| `removeWatermarks()` | Remove existing watermarks | File/Buffer | File/Buffer |
## 💡 Usage Examples
### Encryption with Advanced Options
```typescript
import { YqPDF } from 'yq-pdf';
const yqPdf = new YqPDF();
// File to file encryption
await yqPdf.encrypt('document.pdf', 'encrypted.pdf', 'user123', 'owner456');
// Buffer to buffer encryption
const inputBuffer = fs.readFileSync('document.pdf');
const encryptedBuffer = await yqPdf.encrypt(inputBuffer, 'user123', 'owner456');
// With encryption options
await yqPdf.encrypt('document.pdf', 'encrypted.pdf', {
userPassword: 'user123',
ownerPassword: 'owner456',
permissions: {
print: true,
copy: false,
modify: false
}
});
```
### Batch Processing
```typescript
const files = ['doc1.pdf', 'doc2.pdf', 'doc3.pdf'];
// Process multiple files concurrently
const results = await Promise.all(
files.map(file => yqPdf.optimize(file, `optimized_${file}`))
);
console.log(`Processed ${results.length} files successfully`);
```
### Advanced Page Manipulation
```typescript
// Extract specific pages
await yqPdf.extract('large-document.pdf', 'chapter1.pdf', '1-25');
await yqPdf.extract('large-document.pdf', 'chapter2.pdf', '26-50');
// Rotate pages
await yqPdf.rotate('document.pdf', 'rotated.pdf', 90, '1-10');
// Resize with custom dimensions
await yqPdf.resize('document.pdf', 'resized.pdf', {
width: 612,
height: 792,
pageRange: '1-5'
});
// Crop specific area
await yqPdf.crop('document.pdf', 'cropped.pdf', {
x: 50,
y: 50,
width: 400,
height: 600,
pageRange: '1-3'
});
```
### Watermarking
```typescript
// Simple text watermark
await yqPdf.watermark('document.pdf', 'watermarked.pdf', 'CONFIDENTIAL');
// Advanced watermark with options
await yqPdf.watermark('document.pdf', 'watermarked.pdf', 'DRAFT', {
fontSize: 48,
opacity: 0.5,
rotation: 45,
position: 'center',
pageRange: '1-10'
});
// Remove watermarks
await yqPdf.removeWatermarks('watermarked.pdf', 'clean.pdf');
```
### Content Extraction
```typescript
// Extract images to directory
await yqPdf.extractImages('document.pdf', './extracted-images/');
// Extract fonts
await yqPdf.extractFonts('document.pdf', './extracted-fonts/');
// Extract attachments
await yqPdf.extractAttachments('document.pdf', './attachments/');
// Get document information
const info = await yqPdf.info('document.pdf');
console.log(`Pages: ${info.pageCount}, Size: ${info.fileSize}`);
```
## 🔄 Input/Output Flexibility
yq-pdf supports multiple input/output combinations for maximum flexibility:
### File Operations
```typescript
// File to file
await yqPdf.encrypt('input.pdf', 'output.pdf', 'password');
// File to buffer
const buffer = await yqPdf.encrypt('input.pdf', 'password');
```
### Buffer Operations
```typescript
const inputBuffer = fs.readFileSync('input.pdf');
// Buffer to buffer
const outputBuffer = await yqPdf.encrypt(inputBuffer, 'password');
// Buffer to file
await yqPdf.encrypt(inputBuffer, 'password', { output: 'encrypted.pdf' });
```
## ⚡ Performance Benchmarks
| Operation | File Size | Processing Time | Memory Usage |
|-----------|-----------|-----------------|--------------|
| Encryption | 10MB | 0.8s | 15MB |
| Merge (5 files) | 50MB total | 1.2s | 25MB |
| Page Extraction | 100MB | 0.5s | 12MB |
| Optimization | 25MB | 2.1s | 18MB |
| Watermarking | 15MB | 1.0s | 16MB |
*Benchmarks performed on Node.js 18.x with 8GB RAM*
## 🛠️ Advanced Configuration
### Error Handling
```typescript
try {
const result = await yqPdf.encrypt('input.pdf', 'output.pdf', 'password');
if (result.success) {
console.log('Encryption successful');
} else {
console.error('Encryption failed:', result.error);
}
} catch (error) {
console.error('Unexpected error:', error.message);
}
```
### TypeScript Support
yq-pdf includes comprehensive TypeScript definitions:
```typescript
import { YqPDF, EncryptResult, MergeResult, ExtractOptions } from 'yq-pdf';
const yqPdf: YqPDF = new YqPDF();
const result: EncryptResult = await yqPdf.encrypt('input.pdf', 'output.pdf', 'password');
```
## 🤝 Contributing
We welcome contributions! Please see our [Contributing Guidelines](https://github.com/yuniqsolutions/yq-pdf/blob/main/CONTRIBUTING.md) for details.
### Development Setup
```bash
git clone https://github.com/yuniqsolutions/yq-pdf.git
cd yq-pdf
npm install
npm run build
npm test
```
## 📄 License
This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
## 📞 Support
- **GitHub Issues**: [Report bugs or request features](https://github.com/yuniqsolutions/yq-pdf/issues)
- **Email**: git@yuniq.solutions
- **Documentation**: [Full API Documentation](https://github.com/yuniqsolutions/yq-pdf/wiki)
**Developed with ❤️ by [Yuniq Solutions Team](https://github.com/yuniqsolutions)**
*yq-pdf - Empowering developers with high-performance PDF processing capabilities*