All-in-one document viewer: PDF, Office, spreadsheets, presentations, code files & OCR text extraction — fully offline, zero tracking, open-source.
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This project is part of the FadSec Lab suite.
Discover our focus on ad-free, privacy-first applications and stay updated on future releases!
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More from FadSec Lab: 🔒 FadCrypt — file/folder encryption 🎥 FadCam — background video recorder |
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Home & Library
Home — Dashboard with stats, recent files, and quick actions Library — Browse documents by category with rich thumbnail previews
PDF & Document Viewer
PDF Viewer — Header with metadata, page navigation, copy all pdf (for LLMs), invert, text mode & theme toggle Sidebar — Pages, search, toc. notes & bookmarks (coming soon) Spotlight Search — Animated dim+punch-hole find effect
OCR Text Extraction
OCR Camera — Capture or upload an image for text extraction OCR Results — Extracted text with bounding rectangles drawn around found content
File Previews
Sheets — Sticky headers/rows, zoom, fullscreen, copy cell value Text Viewer — Font picker (Ubuntu/Mono), copy, theme toggle JSON — Syntax highlighted code
DOCX — Formatted document rendering via LibreOfficeKit PPT — Presentation rendering with slide navigation
📄 Documents, Spreadsheets & Presentations
- PDF via native pdfrx engine — page navigation, text selection & extraction, invert mode, text reader mode, and spotlight search (animated dim+punch-hole effect for found terms)
- Microsoft Office: DOCX, DOC, XLSX, XLS, PPT, PPTX
- OpenDocument: ODT, ODS, ODP
- Other: RTF, CSV
- All Office and OpenDocument formats powered by the embedded LibreOffice Kit for desktop-class rendering
- Apache POI handles native spreadsheet parsing on Android
- Sheets & CSV: Sticky row numbers on left, sticky column headers (A, B, C…), tap to highlight row/column, copy cell values, zoom in/out, fullscreen mode
- TXTs & Code: Adjustable font picker (Ubuntu, Mono), word wrap, copy mode, fast theme toggle
🖼️ Images & Code Files
- Images: PNG, JPG, GIF, WEBP, BMP, SVG
- Code/Data: Java, Python, Shell, HTML, JSON, XML, Markdown, Log
- Syntax highlighting with color-coded rendering
- Adjustable font size, word wrap, and reading mode
🧠 Intelligent OCR & On-Device AI
- Extract English text from images via Tesseract OCR + OpenCV preprocessing
- Dual PSM modes and automatic rotation correction for accurate results
- All AI runs entirely on-device — no cloud, no uploads, complete privacy
- More languages planned for future releases
📊 Reading Stats Dashboard
- Home screen stats card tracks total documents, storage used, and reading time across all files
- Reading time is measured automatically: when you open a document, a session timer starts. When you leave the viewer, the elapsed time is calculated and added to the file's total
- Each file tracks its own cumulative reading time, shown in the stats card as hours/minutes
- Also displays the most recently opened file for quick access
📚 Library with Category Folders
- Files are auto-organized into categories (PDF, Docs, Sheets, Slides, Code, Scans, Other) with fast filters and sorting
- Files are stored in Fadocx's private app storage — no reliance on public folders
- Browse by category with dedicated chip filters
- Search by file name or type
- Sort by latest, oldest, largest, or smallest
- Switch between grid and list views
- Rich dynamic thumbnails — thumbnails are generated by extracting real document content and rendering it in a readable preview, giving you a genuine look at each file before opening
📊 Rich File Metadata
Every document type shows relevant metadata both in the document viewer header and in thumbnail previews inside the library — so you can learn about your files without opening them.
| File Type | Metadata Shown |
|---|---|
| Pages, reading time, word count, line count | |
| DOCX / Text | Reading time, word count, line count |
| Excel / CSV | Number of rows |
| JSON | Lines, total objects, total arrays |
| Code files | Lines, total classes, total functions |
The metadata header in the viewer gives you instant insight into your document's structure and size, while the library thumbnails surface the same info so you can compare files at a glance.
📁 File Management
- Import: Browse your device or use the file picker to import documents into Fadocx's private storage. Files are automatically sorted into the correct category folder
- Rename: Change file names directly in-app with extension preservation
- Duplicate: Create copies with auto‑numbered names ("copy", "copy 2", etc.)
- Export: Save files to Downloads or choose a custom location
- Delete: Soft‑delete with trash bin and restore option
- Multi‑select: Long‑press to enter selection mode for batch operations
- File info: View detailed metadata including size, type, dates, and extracted text
🔍 Search & Navigation
- Full-text search within documents with spotlight mode — found terms are highlighted with an animated dim+punch-hole effect that makes them impossible to miss
- Category chips for quick filtering
- Sort by date, size
- Recent files list on home screen
- Rich thumbnail previews with file metadata for quick visual identification
🎨 Themes & Privacy
- Light and dark themes — system aware or manual toggle
- Zero tracking. No analytics. No telemetry. Read our privacy policy
- 100% offline — no internet permission required for document viewing
- Open source — fully auditable codebase
- FadDrive — End-to-end encrypted cloud sync across devices
- Document Conversion — Convert between formats (PDF ↔ DOCX, etc.)
- Document Editing — Full formatting support
- Bookmarks & Annotations — Mark pages and add notes
- AMOLED Black Theme — Pure black for deeper contrast
- More OCR Languages — Multi-language support beyond English
- Desktop & iOS apps — Same experience on every platform
Fadocx is built on a simple principle: your documents stay yours.
- 100% offline — no internet required
- No tracking, analytics, crash logs, or telemetry
- All AI/OCR runs on-device
- Open source — audit the code yourself
See PRIVACY.md for the full privacy policy.
Join our Discord server to share ideas, seek help, or connect with other users.
Support development via Patreon.
We welcome contributions! Before starting any work:
- Open an Issue — Discuss your proposed changes first so we can track progress and avoid duplicated effort.
- Fork & Implement — Work on your changes in a fork.
- Submit a PR — Link your pull request to the related issue with a clear description.
Fadocx supports arm64-v8a architecture only (64-bit ARM). This is due to LibreOffice native code dependencies which are only compiled for arm64-v8a.
- ✅ arm64-v8a (64-bit ARM) — Most modern Android devices
- ❌ armeabi-v7a (32-bit ARM) — Not supported (missing LibreOffice native code)
- ❌ x86_64 (Intel/AMD) — Not supported (missing LibreOffice native code)
# Clone repository
git clone https://github.com/anonfaded/Fadocx.git
cd Fadocx
# Install and enable Git LFS (required once per machine)
git lfs install
# Download LFS objects (ensures large native libraries are populated)
git lfs pull --all
# Install Dart/Flutter dependencies
flutter pub getNote: This repository stores a large native library via Git LFS. If you do not run
git lfs installandgit lfs pull --allafter cloning, the large files will appear as small pointer files instead of the expected binaries.
Use the interactive build script for easy building and installation:
./build.shThis opens a menu with options to:
- Build & Install — Build and immediately install on connected device
- Build Only — Build APK for manual installation later
- Dev: Run — Hot reload development mode with live debugging
- Uninstall — Remove app from device
For detailed build options and commands, see BUILD_GUIDE.md.
# Build release APK (minified, ~346MB)
flutter build apk --flavor prod --release --split-per-abi --target-platform android-arm64
# Install on device
adb install -r build/app/outputs/flutter-apk/app-arm64-v8a-prod-release.apk
# Run with hot reload (development)
flutter run --flavor prod| Build Type | Size | Optimization |
|---|---|---|
| Release | ~346MB | R8 minification |
| Debug | ~400MB | No minification |
# Run the beta flavor on a connected device or emulator
flutter run --flavor betaGNU General Public License v3.0