Convert MOBI to EPUB Online

Q: Why does Amazon Send to Kindle reject MOBI files?

Amazon deprecated the legacy MOBI format in late 2023. Modern Kindle devices use modern typography standards (KFX/AZW3), and Send to Kindle now officially requires EPUB files.

Q: Will converting MOBI to EPUB keep my book cover and chapters?

Yes. PureEPUB preserves existing embedded covers, chapter metadata, tables of contents, and formatting while updating the HTML structure to the modern EPUB standard.

Q: Is PureEPUB really free with no file retention?

Yes. PureEPUB is completely free. Files are processed in temporary memory and permanently destroyed right after conversion with zero data retention.

Modernize obsolete MOBI files into clean, reflowable EPUB books ready for Amazon Send to Kindle, Kobo, and Apple Books.

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Drop your book here, or browse

Drag & drop your file, or click to browse (Up to 90 MB)

PDF EPUB MOBI AZW3 FB2 DOCX TXT

Best for text PDFs, EPUBs & Word docs. Scanned image books need OCR first.

🖼️ Add Custom Cover (Optional)

Format For E-Reader

🔥 Kindle Amazon Ready ⚡ Kobo KePub Fast 🌐 Universal Standard EPUB

🖼️ Lockscreen & Cover Fit Ambient

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Split Long Chapters (Part 1, 2...)

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🔄 Fix Amazon Send-to-Kindle: Convert MOBI to EPUB

Amazon officially discontinued support for the older MOBI format across all Send to Kindle services. Trying to email or upload a .mobi file now triggers a "Failed to Deliver" rejection. PureEPUB converts your legacy MOBI files into modern, compliant EPUB3 e-books with beautiful typography and cloud Whispersync support.

📬 Zero Amazon Errors

Complies 100% with Amazon's EPUB standard for seamless Send-to-Kindle delivery.

📖 Bookerly & Font Choice

Unlocks modern font rendering, boldness sliders, and custom typography on your device.

📱 Universal E-Reader Ready

Read on any device: Amazon Kindle, Kobo, PocketBook, Tolino, or Apple Books.

🔒 100% Private & No Limit

Convert without registrations, paywalls, or file retention. Files are deleted right after download.

How to Convert MOBI to EPUB

1 Drop your .mobi file into the converter box above.

2 Click Convert. PureEPUB modernizes the internal markup into clean EPUB.

3 Download your EPUB or click Send to Kindle to deliver wirelessly!

❓ Frequently Asked Questions

Why does Amazon Send to Kindle reject MOBI files?

Amazon deprecated MOBI because it is an outdated, legacy format based on 1990s Mobipocket code. Modern Kindle devices use modern typography standards (KFX/AZW3), and Amazon’s cloud servers now require EPUB files to generate optimal layouts.

Will converting MOBI to EPUB lose my book cover or chapters?

No. PureEPUB preserves existing embedded covers, chapter metadata, tables of contents, and formatting while updating the HTML structure to the modern EPUB standard.

Can I convert AZW and AZW3 files as well?

Yes! PureEPUB supports non-DRM MOBI, AZW, AZW3, FB2, PDF, DOCX, and TXT files. Simply drag and drop your file to convert.

Is PureEPUB really free with no file retention?

Yes. Unlike other converters that restrict you to 2 files before requiring a subscription, PureEPUB is completely free. Files are processed in temporary memory and permanently destroyed right after conversion.

Convert MOBI to EPUB Online

🔄 Fix Amazon Send-to-Kindle: Convert MOBI to EPUB

How to Convert MOBI to EPUB

❓ Frequently Asked Questions

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