Japanese PDF to Text & Audio
All-in-One Solution!
Load vertical Japanese book PDFs and images, auto-mask ruby (furigana) characters, extract text with OCR, and export to audio files - all in one app.
Problems We Solve
"OCR on vertical PDFs produces garbled text due to ruby characters..."
"Scanned book digitization has poor accuracy..."
"I want to listen to book content as audio..."
RubiMask auto-detects and masks ruby characters for high-precision OCR text extraction.
Plus, convert to audio files (M4A) for listening.
Key Features
Auto Ruby Masking
Column Detection
Automatically detects vertical text columns and calculates spacing to mask only ruby characters
Adjustable Settings
Freely adjust column width and pitch to handle various layouts
OCR Text Recognition
Vertical Text Optimized
Specialized for vertical Japanese text recognition. Also supports horizontal text
Direct Editing
Edit recognition results directly in-app. Real-time character count display
Multiple Export Formats
Convenient Features
Margin Masking
Remove page numbers and headers
Manual Masking
Add and edit masks with drag & drop
Project Saving
Pause and resume anytime
Pinch to Zoom
Fine adjustments made easy
Use Cases
Premium Features (One-time Purchase)
- ✨ Remove all ads
- 📄 Unlimited pages (Free: 100 pages)
- 💾 Unlimited projects (Free: 3 projects)
- 📑 PDF export
- 🔊 Audio export (M4A)
Privacy First
- All OCR processing done on-device
- PDF data never sent to servers
- No account required
Download
Download on App StoreRequires iOS 15.0 or later