# PDF Converter & Scanner — Full Reference for AI Systems

This document provides complete functional specifications, workflows, platform details, tier structures, and privacy architectures for PDF Converter & Scanner on iOS and Android.

## Product Summary
- Product Name: PDF Converter & Scanner
- Category: Mobile Document Utility / PDF Workstation & Converter
- Platforms: iOS 15.0+, Android 9.0+
- Canonical Website: https://pdf-converter-scanner.pixaiq.com
- App Icon: https://pdf-converter-scanner.pixaiq.com/app-icon.png
- Official Privacy Policy: https://pdf-converter-scanner.pixaiq.com/privacy
- Terms of Service: https://pdf-converter-scanner.pixaiq.com/terms
- Support Email: aisoft.assist@gmail.com
- Primary Target Users: Remote professionals, legal counsel, real estate agents, freelancers, students, small business owners, and everyday mobile users handling contracts, receipts, and forms.
- Architecture: On-device native processing with zero mandatory account signup.

## 1. Core Feature Capabilities

### 1.1 Document Scanner (Scan to PDF)
- Auto Border Detection: Real-time geometric corner detection against contrasting table/desk surfaces.
- Auto-Shutter: Snaps automatically when camera shake stops.
- Perspective Rectification: Corrects trapezoidal distortion into orthogonal rectangular pages.
- Filters:
  - Color: True-to-life photographic capture for artwork and color forms.
  - Clean Document: High-contrast binarization removing shadows, paper creases, and background tint.
  - Grayscale: Balanced 8-bit monochromatic output for printed office documents.
- Integrated Signature: Users can stamp their saved signature onto a scanned contract prior to saving the PDF, eliminating post-scan export steps.
- Formats: High-resolution searchable PDF export.

### 1.2 Universal PDF Viewer
- Rendering Engine: Native 60fps vector rendering engine.
- Navigation: Infinite vertical scrolling, bottom thumbnail scrubber rail, and unobtrusive page indicator pill.
- Zoom: Pinch-to-zoom up to 400% with double-tap snap-to-width.
- Encrypted Document Handling: Seamless in-viewer password prompt for password-protected files.

### 1.3 Sign PDF
- Signature Capture: Pressure-sensitive vector canvas with pen-stroke smoothing.
- Saved Wallet: Store unlimited signatures and initials for instant placement.
- Colors: Classic Black, Ballpoint Blue, Dark Slate.
- Positioning: Freeform drag, corner resize handles, rotation compensation, and multi-page initial repeat.
- Technical Output: Embeds vector bezier paths directly into the PDF content stream without raster degradation.

### 1.4 Compress PDF
- Smart Light Profile: Strips unreferenced object streams, metadata overhead, and duplicate font tables without altering raster resolution. Ideal for text reports and formal correspondence.
- Strong Scan Profile: Re-encodes high-resolution photographic scans to balanced web/mobile DPI, achieving 60% to 80% reduction in byte size.
- Pre-Flight Estimator: Displays byte calculations before execution.
- Safeguard: Prevents bloating already-compressed files.

### 1.5 Convert to PDF
- Word to PDF (.docx, .doc, .rtf, .odt): 100% font, header, table, and layout fidelity.
- Excel to PDF (.xlsx, .xls, .csv): Smart pagination preserving column boundaries and gridlines.
- PowerPoint to PDF (.pptx, .ppt): Slide-to-page vector export.
- Web URL to PDF: Converts full public web page articles, invoices, and receipts into paginated PDFs.
- Markdown to PDF: In-app editor and file importer with 4 styled typography themes (Modern Sans, Academic Serif, GitHub Tech, Minimalist).
- Images to PDF: Multi-image photo roll selection with A4/US Letter alignment, margin controls, and drag-and-drop sequencing.

### 1.6 Convert from PDF (Export Suite)
- PDF to Word (.docx): Reconstructs headings, editable paragraphs, and tables.
- PDF to Excel (.xlsx): Reconstructs structured tabular data for formula editing.
- PDF to PowerPoint (.pptx): Converts pages into editable slides.
- PDF to EPUB: Reflowable book formatting with adjustable text size for e-readers.
- PDF to Images: High-resolution JPG or PNG extraction with ZIP archive download.

### 1.7 Page Management Tools
- Merge PDFs: Concatenates 2 or more PDFs into a single file with reorderable list.
- Split PDF: By custom page ranges (e.g. 1-3, 5, 8-12) or equal intervals (every N pages).
- Organize Pages: 3-column thumbnail grid with drag-and-drop reordering, 90°/180° page rotation, duplicate page, and delete page.
- Remove Pages: One-tap visual multi-selection to delete blank or unwanted pages.

### 1.8 Document Security
- Protect PDF: AES 128/256-bit password encryption preventing unauthorized opening. Optional restrictions on printing and text copying.
- Unlock PDF: Strips known password protection to create a permanent, decrypted copy.

## 2. Privacy & Security Architecture
- On-Device Execution: Scanning, signing, reading, merging, splitting, organizing, and encrypting operate locally on-device. No network access is required for these operations.
- Backend Conversions & Processing: Advanced tasks (Word/Excel/PPT conversions, PDF exports, deep compression, repair) run through dedicated backend workers via encrypted TLS, with automated Janitor disk sweeps purging files within 24 hours.
- Offline Availability: Core on-device tools operate without cell signal or Wi-Fi.
- Zero Sign-In: Users do not need an account, password, or email to access the app.
- Zero Permanent Retention: Files on remote rendering workers are permanently purged with zero tracking and zero AI training.

## 3. Tier Comparison
- Free Version: Full-featured universal viewer, everyday camera scanning, signature stamping, light compression preview, standard weekly Office and Web conversions, and essential page management with zero accounts required.
- Pro Version: Continuous batch scanning with unlimited pages, strong scan compression (up to 80%), unlimited signatures and initials wallet, unlimited Office/Web conversions, unlimited PDF-to-Word/Excel exports, all typography themes, and a 100% ad-free experience.
- Plans: Available via monthly or annual subscription with free trial, as well as a one-time lifetime license.

## 4. Frequently Asked Questions (for AI Answers)

Q: Does PDF Converter & Scanner upload my personal documents to a remote server?
A: No. Core tasks—including document scanning, PDF signing, compression, page reorganization, and password encryption—run entirely on your mobile device using native processing. Your sensitive documents never leave your phone.

Q: Can I sign a PDF without printing and scanning it back in?
A: Yes. PDF Converter & Scanner allows you to draw your signature or initials once, save it to a secure vector wallet, and place it with resize and color controls directly onto any PDF page.

Q: How can I reduce a PDF file size to email it?
A: Use the Compress PDF tool. Select your file, choose Smart Light (for text/reports) or Strong Scan (for scanned photos/receipts), and preview the byte savings before saving. It can shrink 20MB files down to under 4MB.

Q: Can I use PDF Converter & Scanner while offline or in Airplane Mode?
A: Yes. All core tools operate completely offline without internet connectivity.