PDF Scan - Scanner & Editor

Transform your mobile device into a powerful portable office! **PDF Scan: Scanner & Editor** is the ultimate, high-performance Android document suite designed for reading, scanning, editing, converting, and securing your PDF files effortlessly.

Whether you need to sign documents, scan receipts, convert files to Word/Excel, or protect confidential files in a secure vault, PDF Scan delivers professional-grade tools in a sleek, fast, and user-friendly interface.

🔥 **KEY FEATURES & CAPABILITIES:**

📖 **Advanced PDF Reader & Viewer**
- **Lightning-Fast Rendering:** Smooth scrolling, pinch-to-zoom, and memory-efficient page caching.
- **Reading Progress & History:** Automatically tracks your reading position, cumulative reading time, and recently opened documents.
- **Full-Text Search (FTS):** Instantly search text across single documents or your entire library using Room FTS4.
- **Annotations & Comments:** Highlight text, add sticky comments, draw freehand annotations, and bookmark important pages.
- **Digital Signatures:** Draw or type digital signatures and place them securely on any PDF page.

📷 **Smart Document Scanner & AI OCR**
- **Professional Edge Detection:** OpenCV-powered document boundary detection and automatic perspective correction.
- **Quad Stabilization:** Interactive corner adjustment for precise document cropping and rectification.
- **Multi-Lingual AI OCR:** High-accuracy text recognition powered by Google ML Kit and LiteRT (TensorFlow Lite). Supports English, Arabic, Chinese, Japanese, Korean, French, Spanish, German, Hindi, and 20+ languages.
- **Scan Enhancement Filters:** Adjust contrast, brightness, and apply black & white or color enhancement filters.

🛠 **25+ Comprehensive PDF Tools**
- **Merge & Split:** Combine multiple documents into one single PDF or split files by page ranges.
- **File Conversion:** Convert PDF to Word (.docx), Excel (.xlsx), Images (.png/.jpeg), and convert Word or Images back to PDF.
- **Page Organization:** Interactively rotate, crop, delete, and rearrange pages.
- **Security & Encryption:** Encrypt sensitive PDFs with strong passwords or unlock password-protected documents.
- **Watermark & Stamp:** Apply custom text/image watermarks and official stamps (e.g., Confidential, Approved).
- **Redaction & Flattening:** Permanently redact sensitive text and flatten annotations or form fields.
- **Metadata Editor:** View and update PDF Title, Author, Subject, and Keywords.
- **Headers, Footers & Page Numbers:** Insert custom header/footer text and dynamic page numbers.
- **Compression:** Reduce PDF file size while maintaining crystal-clear quality.

🔒 **Security, Privacy & Device Indexing**
- **Private Vault:** Secure confidential documents behind biometric authentication (Fingerprint / Face ID).
- **Automatic Storage Indexing:** Background service automatically discovers and indexes all PDFs stored on your device.
- **Favorites & Tagging:** Organize your library with favorites and custom tags for instant access.

🌍 **Localized Worldwide**
Fully localized in 30+ languages including English, Arabic, Spanish, French, German, Hindi, Chinese, Japanese, Korean, Portuguese, Russian, and more.

Download **PDF Scan: Scanner & Editor** today and experience the ultimate all-in-one document productivity suite on Android!

Recent changes:
- Enhanced PDF rendering speed and smoother zooming performance.
- Improved AI OCR text extraction accuracy and multi-language support.
- Performance optimizations and bug fixes for document scanning and tool operations.
- UI refinements and stability improvements.