Convert MOBI to EPUB Online — Escape the Kindle Ecosystem
Read your Kindle books on Kobo, Nook, Apple Books, or any e-reader.
Drop up to 50 MOBI files at once — no install, no sign-up required.
Drop MOBI Files Here
Encrypted EU Servers Auto-delete 1h
How it works
- 1 · Drop your files
Drag & drop or choose MOBI files. No account required—paid plans unlock bigger batches, higher limits, and priority queues.
- 2 · We convert securely
Processed on our dedicated servers using Calibre. Encrypted in transit & at rest. 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.
MOBI (Mobipocket) is an ebook format originally developed by Mobipocket SA, later acquired by Amazon in 2005. MOBI files use the .mobi extension and are based on the Open eBook standard with proprietary extensions for DRM and advanced formatting.
Learn more: MOBI on MobileRead Wiki
MOBI is widely compatible with all generations of Kindle devices and Kindle apps, making it ideal for users with older Kindles. While Amazon has transitioned to newer formats like AZW3 (KF8), MOBI remains the most broadly compatible format for the Kindle ecosystem.
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 MOBI to EPUB?
What devices support EPUB?
Can I convert DRM-protected MOBI files?
No. DRM-protected MOBI files (purchased from Amazon with copy protection) cannot be converted. You must remove DRM protection first using appropriate tools, or contact Amazon for a DRM-free version if available.
Will formatting be preserved?
Which format is better for modern e-readers?
I'm switching from Kindle to Kobo—should I convert all my MOBI files?
Will my Kindle highlights and notes transfer to EPUB?
Can newer Kindles (2022+) read EPUB directly?
What are the limits for this converter?
| Tier | Max File Size | Max Files/Batch | Parallel Processing |
|---|---|---|---|
| Free | 50 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 ebooks converters site-wide. See all converter limits →
How are credits calculated for this conversion?
Cost: 1 credit per 10 MB
How it works:
- Files up to 10 MB: 1 credit (minimum)
- 11-20 MB: 2 credits
- 21-30 MB: 3 credits
- 31-40 MB: 4 credits
- Over 1024 MB: 103 credits (maximum cap)
Example: A 5 MB file = 1 credit. A 95 MB file = 10 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 | — | 25,000 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 10 MB, images under 10 MB cost 1 credit each. Pro users can convert 10,000 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 Ebook Converters
Converting from other Kindle formats or optimizing for Kobo?
Choose Your Plan
Limits shown for MOBI 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
- 50 MB per file
- 50 files per batch
- 3 parallel standard conversions
- 2 parallel AI 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 standard conversions
- 4 parallel AI 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 standard conversions
- 6 parallel AI conversions
- 25,000 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 MOBI to EPUB
Latest improvements to this converter
Initial release of MOBI to EPUB converter for universal e-reader compatibility.