Convert Word to EPUB Online - Create Ebooks from Word
Transform Word documents into portable ebook format with preserved formatting.
Drop up to 50 Word files at once — no install, no sign-up required.
Drop Word Files Here
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How it works
- 1 · Drop your files
Drag & drop or choose Word files. No account required—paid plans unlock bigger batches, higher limits, and priority queues.
- 2 · We convert securely
Processed on our dedicated servers. Encrypted in transit & at rest. Heading structure, images, and formatting are preserved. We never store filenames—only file types & sizes for accounting.
- 3 · Download & auto-delete
Grab your EPUB files in seconds. Files delete automatically after 1 hour. Delete anytime after downloading with one click.
DOCX is Microsoft's modern Word document format based on Office Open XML (OOXML), standardized as ISO/IEC 29500. Introduced in Office 2007, DOCX stores content as compressed XML files inside a ZIP container, supporting rich text formatting, embedded media, styles, templates, and change tracking. Unlike the legacy binary DOC format, DOCX is more compact, less prone to corruption, and easier for third-party applications to parse.
Learn more: Office Open XML on Wikipedia
DOCX is the standard for collaborative document editing and remains fully compatible with Microsoft Word, Google Docs, LibreOffice, and most document processors. For final distribution or archival, consider converting to PDF.
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 DOCX format?
Why convert DOCX to EPUB?
What is preserved during conversion?
Does the conversion preserve images?
Yes. Embedded images in your DOCX are extracted and included in the EPUB. Images are preserved at their original resolution. Very large images may be optimized to keep the EPUB file size reasonable.
Will headings become chapters?
What EPUB version is generated?
How large can my DOCX files be?
Can I convert multiple DOCX files at once?
What are the limits for this converter?
| Tier | Max File Size | Max Files/Batch | Parallel Processing |
|---|---|---|---|
| Free | 25 MB | 50 files | 3 at once |
| Pro | 200 MB | 200 files | 6 at once |
| Business | 1024 MB | 1000 files | 10 at once |
Note: File size limits are specific to this converter. Batch and parallel processing limits apply to all documents converters site-wide. See all converter limits →
How are credits calculated for this conversion?
Cost: 1 credit per 25 MB
How it works:
- Files up to 25 MB: 1 credit (minimum)
- 26-50 MB: 2 credits
- 51-75 MB: 3 credits
- 76-100 MB: 4 credits
- Over 1000 MB: 40 credits (maximum cap)
Example: A 5 MB file = 1 credit. A 95 MB file = 4 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 |
|---|---|---|
| Free | 50 credits/day | — |
| Pro | — | 10,000 credits/month |
| Business | — | 30,000 credits/month |
Daily credits (Free tier, including guests) reset every day at midnight UTC. Monthly credits (Pro & Business) reset on your billing cycle date.
Note: With 1 credit per 25 MB, a typical document costs 1 credit. Pro users can convert 10000 documents 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?
Choose Your Plan
Limits shown for Word to EPUB conversion. One subscription unlocks the entire Tools.FAST Network. Plans cover Convert.FAST, Compress.FAST, PDF.FAST (soon), and all future tools.
Free
For occasional personal use
- 25 MB per file
- 50 files per batch
- 3 parallel conversions
- 50 credits/day
- Standard priority
- Email support
No sign-up required. Create an account for your own credit pool.
Pro
For independent work
- 200 MB per file
- 200 files per batch
- 6 parallel conversions
- 10,000 credits/month across Tools.FAST
- High priority
- Email & chat support
- One subscription for the entire Tools.FAST network
Business
For production scale
- 1 GB per file
- 1000 files per batch
- 10 parallel conversions
- 30,000 credits/month across Tools.FAST
- Add seats to invite team members
- Highest priority
- Priority email & chat support
- One subscription for the entire Tools.FAST network
How Credits Work
- Usually 1 credit per conversion. Exact cost shown before you start.
- Credits refresh monthly on your billing cycle.
- Unused credits roll over, capped at your plan's monthly amount.
- One subscription, all sites. Works across Convert.FAST, Compress.FAST, and future tools.
What's New in Word to EPUB
Latest improvements to this converter
Initial release of DOCX to EPUB converter for high-fidelity Word to ebook conversion.