File Requirements
Learn what types of PDFs work best for audio conversion
Quick Requirements
File Format
PDF files only
File Size
Maximum 16MB
Content Type
Text-based PDFs
Security
No password protection
Detailed File Requirements
📄 Supported File Types
Currently, we only support PDF files. Other formats like Word PDFs, text files, or images are not supported at this time.
📐 File Size Limits
For best performance, keep your PDF files under 10MB. Larger files will take longer to process and may timeout on slower connections.
📝 Content Requirements
🎯 Best Results
- Text-based PDFs with selectable text
- Standard fonts and formatting
- Simple layouts with paragraphs
- Clear, readable text without decorative elements
- PDFs created from word processors
✅ Good Results
- PDFs with some formatting (bold, italic)
- PDFs with headers and footers
- Multi-column layouts
- PDFs with embedded fonts
- Academic papers and reports
⚠️ Limited Results
- Scanned PDFs (image-based PDFs)
- PDFs with complex layouts or graphics
- PDFs with tables and forms
- PDFs with unusual fonts or encodings
- Heavily formatted PDFs
❌ Not Supported
- Encrypted or password-protected PDFs
- Files containing only images without selectable text
- PDFs requiring OCR processing
- Files larger than 16MB
- Corrupted or malformed PDFs
📌 Tips for Best Results
- Use PDFs exported directly from word processors whenever possible.
- Avoid scanned copies—use the original digital PDF if available.
- Simplify layouts by removing unnecessary graphics or background images.
- Ensure the PDF language matches the voices you plan to use.
- Check that the PDF isn’t password protected or restricted.
Frequently Asked Questions
Can I upload scanned PDFs?
Scanned PDFs with image-only content are not supported because they require OCR processing.
Do you support other PDF formats?
Not at the moment. We focus on providing the best possible PDF experience first.
Will OCR support be added?
It’s on our roadmap. Sign up for updates to be notified when OCR support becomes available.
Why is there a 16MB limit?
Keeping file sizes smaller ensures fast, reliable processing and playback.
🌍 Language Support
Our service works with PDFs in multiple languages. The system automatically detects the language of your PDF and selects appropriate voice options for audio generation.
Best Practices for Optimal Results
Prepare Your PDF
- Use clear, readable fonts
- Ensure text is selectable (not just images)
- Remove unnecessary formatting
- Check for spelling errors
Optimize File Size
- Compress images within the PDF
- Remove unnecessary pages
- Use PDF optimization tools
- Split large PDFs into sections
Test Your PDF
- Try selecting text in your PDF viewer
- Check that all text is readable
- Verify there are no password restrictions
- Ensure the file opens properly
Improve Processing Speed
- Keep files under 10MB when possible
- Use simple, standard layouts
- Avoid complex graphics and tables
- Ensure a stable internet connection
Common Issues & Solutions
❌ “File not supported” error
- Ensure your file has a .pdf extension
- Try re-saving the document as a PDF
- Check that the file isn’t corrupted
- Verify the file size is under 16MB
📝 Missing or garbled text
- Check if text is selectable in your PDF viewer
- Try using a different PDF creation method
- Ensure fonts are embedded in the PDF
- Avoid using image-based or scanned PDFs
⏳ Processing takes too long
- Reduce file size by compressing images
- Split large PDFs into smaller sections
- Check your internet connection speed
- Try uploading during off-peak hours
Still Having Issues?
If your PDF still isn’t working after following these guidelines, please contact our support team. Include information about:
- The source of your PDF (scanned, exported from Word, etc.)
- File size and number of pages
- Any error messages you received
- What type of content is in the document