Convert PDF to EPUB Online — Read Anywhere
AI-powered extraction with Azure Document Intelligence — 300+ languages, up to 99% accuracy.
Drop up to 50 PDF files at once — no install, no sign-up required.
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How it works
- 1 · Drop your files
Drag & drop or choose PDF files. No account required—paid plans unlock bigger batches, higher limits, and priority queues.
- 2 · We convert with AI
Processed by Microsoft Azure Document Intelligence in the EU, an enterprise-grade AI service with 300+ language support. Encrypted in transit & at rest. Text, headings, tables, and reading order are extracted and converted to reflowable EPUB.
- 3 · Download & auto-delete
Grab your EPUB files in seconds. Files delete automatically after 1 hour. Delete anytime after downloading with one click.
PDF (Portable Document Format) is Adobe's universal document standard, designed to present text, images, and layout consistently across any device or platform. First released in 1993 and later standardized as ISO 32000, PDF supports vector graphics, embedded fonts, forms, annotations, and encryption. It has become the de facto format for document exchange, digital publishing, and archival—billions of PDFs are created daily worldwide.
Learn more: PDF on Wikipedia
PDF excels at preserving document fidelity and works universally—every operating system and browser includes native PDF support. For long-term archival or regulatory compliance, PDF/A is the appropriate variant.
EPUB (Electronic Publication) is an open ebook standard developed by the International Digital Publishing Forum (IDPF), now part of the W3C. First released in 2007 as a successor to Open eBook, EPUB has become the most widely supported ebook format. EPUB files are ZIP archives containing HTML/XHTML content, CSS styling, images, and metadata organized according to the EPUB specification.
Learn more: EPUB on Wikipedia
EPUB's key feature is reflowable content—text automatically adapts to different screen sizes, making it ideal for e-readers, tablets, and phones. The format supports embedded fonts, multimedia (in EPUB 3), and accessibility features. Most e-readers except Amazon Kindle natively support EPUB.
Frequently Asked Questions
What is EPUB format?
Why convert PDF to EPUB?
Does PDF to EPUB conversion work on scanned documents?
Why Azure Document Intelligence?
We use Azure Document Intelligence, Microsoft's enterprise-grade AI service, to extract content from your PDFs. Key advantages:
- 300+ languages — far more than open-source alternatives like Tesseract
- Up to 99% accuracy on clear, high-resolution scans
- Native structure detection — headings, tables, reading order, and page layout are understood, not just raw text
- Enterprise reliability — backed by Microsoft's cloud infrastructure with 99.9% uptime SLA
Where are my documents processed?
Will my PDF's formatting be preserved?
EPUB is a reflowable format, so the exact visual layout will differ from the PDF. However, Azure Document Intelligence preserves document structure—headings, paragraphs, tables, and reading order—far better than traditional extraction tools.
Best results: Text-heavy documents like novels, reports, articles, and technical papers. Less ideal: Heavily designed PDFs like magazines, brochures, or forms with precise visual positioning.
Can I convert password-protected PDFs?
No. Password-protected PDFs cannot be converted. You must remove the password protection first, or provide the password to unlock the document. Contact the document owner for an unprotected version if needed.
What devices support EPUB?
Should I convert PDFs to EPUB or MOBI for Kindle?
How is this different from PDF to DOCX conversion?
What are the limits for this converter?
| Tier | Max File Size | Max Files/Batch | Parallel Processing |
|---|---|---|---|
| Guest/Free | 50 MB | 50 files | 3 at once |
| Pro | 1024 MB | 1000 files | 6 at once |
Note: File size limits are specific to this converter. Batch and parallel processing limits apply to all ebooks converters site-wide. See all converter limits →
How are credits calculated for this conversion?
Cost: 5 credits per page
How it works:
- Files up to 1 page: 5 credits
- 2 page: 10 credits
- 3 page: 15 credits
- 4 page: 20 credits
Example: A 5 MB file = 25 credits. A 95 MB file = 475 credits.
Why per-megabyte? Larger files require more resources (processing, bandwidth, storage).
What are my daily and monthly credit limits?
Credit allocations vary by account tier:
| Tier | Daily Limit | Monthly Limit |
|---|---|---|
| Guest | 100 credits/day | — |
| Free | 100 credits/day | — |
| Pro | — | 12,000 credits/month |
Daily credits (Guest & Free tiers) reset every day at midnight UTC. Monthly credits (Pro) reset on your billing cycle date.
Note: With 5 credit per page, images under 1 MB cost 5 credit each. Pro users can convert 2,400 images per month.
Answers at a Glance
Quick answers to common questions.
- Are my files secure?
- How long do you keep my files?
- What metadata do you keep?
- What happens after I drop a file?
- Why are conversions so fast?
- How do you measure performance?
- What are the exact limits for each plan?
- Can I process files in bulk?
- Why did my file fail to convert?
- Do you use my files to train AI?
Related Converters
Need a different format or want to edit the content?
What's New in PDF to EPUB
Latest improvements to this converter
Upgraded to Azure AI Document Intelligence for text extraction — 300+ languages, structure-aware headings/tables, and PerPage costing.
Initial release of PDF to EPUB converter with automatic OCR for scanned documents.
Need to get more done? Pro starts from $5.
No subscription required.