PDF Translator App 📄

A simple Streamlit application for translating PDF documents using the DeepL API.

Features

• Two-column layout: Upload on the left, view translated document on the right
• PDF information display: Shows number of pages and file size
• Real-time translation progress: Displays spinner with time remaining
• PDF viewer: Built-in PDF.js viewer for the translated document
• Download functionality: Download the translated PDF
• Multiple languages: Support for Spanish, French, German, Italian, Portuguese, Russian, Chinese, and Japanese

Setup

1. Clone the repository (if applicable) or ensure you have all the files

2. Install dependencies:

   pip install -r requirements.txt

3. Get a DeepL API key:

   • Go to DeepL API
   • Sign up for an account
   • Get your API key from the dashboard

Usage

1. Run the Streamlit app:

   streamlit run app.py

2. Enter your DeepL API key in the sidebar

3. Select target language from the dropdown in the sidebar

4. Upload a PDF file using the file uploader on the left side

5. View document info: The app will display the number of pages and file size

6. Click "Translate Document" to start the translation process

7. Monitor progress: Watch the spinner and time remaining on the right side

8. View and download: Once complete, view the translated PDF and download it

Requirements

• Python 3.7+
• DeepL API key (Free or Pro account)
• Internet connection for API calls

Dependencies

• streamlit: Web app framework
• deepl: Official DeepL Python client
• PyPDF2: PDF manipulation library
• requests: HTTP library for API calls
• streamlit-pdf-viewer: PDF viewing component

Supported File Types

• PDF files only (.pdf)

Supported Languages

• Spanish (ES)
• French (FR)
• German (DE)
• Italian (IT)
• Portuguese (PT)
• Russian (RU)
• Chinese (ZH)
• Japanese (JA)

Notes

• The app uses DeepL's document translation API which preserves formatting
• Translation time depends on document size and API response time
• Free DeepL accounts have usage limits
• Large files may take longer to process

Troubleshooting

1. API Key Issues: Make sure your DeepL API key is valid and has sufficient quota
2. PDF Reading Errors: Ensure your PDF is not corrupted or password-protected
3. Translation Failures: Check your internet connection and API quota
4. Display Issues: Try refreshing the page if the PDF viewer doesn't load properly