MOBI to EPUB Converter

How to Convert MOBI to EPUB Online

1. Upload Your MOBI File: Drag and drop or click "Add Files" to select one or more .mobi files from your computer. Batch upload is supported, so you can queue an entire library and convert in one pass.
2. Confirm EPUB as Output: EPUB is selected automatically as the output format. Defaults preserve chapter structure, headings, images, and the table of contents — no extra settings are required for a clean conversion.
3. Reorder or Remove Files (Optional): If you queued a batch, use the file list to remove items you no longer need or reorder before processing. Each file converts independently, so a failure on one does not affect the rest.
4. Convert and Download: Click "Convert" and download each .epub file. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared.

Need the reverse direction or a different output? See EPUB to MOBI for legacy Kindle backups, or MOBI to PDF for printing and archival.

Why Convert MOBI to EPUB?

MOBI is Amazon's legacy e-book container, derived from the 2000-era Mobipocket format and used for Kindle delivery for nearly two decades. EPUB is the open IDPF/W3C standard adopted by virtually every non-Amazon e-reader, library lending platform, and modern Kindle itself. Amazon retired MOBI for new KDP submissions of reflowable books on August 1, 2021 and for fixed-layout books on March 18, 2025, and the Send to Kindle service stopped accepting MOBI uploads on December 20, 2023 — making EPUB the practical choice for both new and old hardware.

• Switching to Kobo, Nook, or Apple Books — Kobo eReaders, Barnes & Noble Nook, and Apple Books all read EPUB natively. Nook and Apple Books do not support MOBI at all; Kobo accepts MOBI via USB transfer but loses annotation sync, dictionary lookup, and reading statistics (features that only work with EPUB). Converting your MOBI library ensures full functionality on any of these devices.
• Modern Kindle Send-to-Kindle workflow — Send to Kindle (web, email, and the Android/iOS apps) accepts EPUB and converts it to KFX on delivery, so EPUB is now Amazon's preferred sideload format for personal documents.
• Library and OverDrive/Libby borrowing — Public-library e-book lending through OverDrive/Libby and most academic platforms distribute in EPUB (with Adobe DRM where applicable); MOBI is not an option for borrowed titles.
• Calibre and Apple Books library management — Calibre, Apple Books, and Adobe Digital Editions all treat EPUB as the canonical format. Keeping a library in EPUB avoids re-conversion every time you sync to a new device.
• Future-proof archival — EPUB 3 is a maintained W3C standard built on HTML, CSS, and XML. Storing your collection as EPUB protects it from the ongoing deprecation of MOBI tooling across publishers and devices.
• Better accessibility — EPUB 3 supports semantic HTML, MathML, media overlays, and screen-reader navigation; MOBI's older container is significantly more limited for assistive tech.

MOBI vs EPUB — Format Comparison

E-Reader Compatibility Matrix

Note: Kobo eReaders technically accept MOBI via USB transfer, but advanced features like Kobo's annotation sync, dictionary lookup, and reading statistics only work reliably with EPUB.

Frequently Asked Questions

Will my chapters, table of contents, and images survive the conversion?

Yes. The converter preserves the table of contents (NCX/nav), chapter breaks, headings, paragraph structure, bold/italic styling, embedded images, and cover art. Complex CSS or fixed-layout MOBI files (KF8) may reflow slightly, but the navigable structure carries over.

Can I convert DRM-protected MOBI files purchased from Amazon?

No. Amazon DRM (and any e-book DRM) is illegal to circumvent in most jurisdictions, and no online converter — including xconvert — can process protected files. Only DRM-free MOBI files (your own work, public-domain titles from sources like Project Gutenberg, or DRM-free purchases from Tor/Smashwords/Standard Ebooks) can be converted.

My Kindle is from 2020. Can I still use the new EPUB to load books?

Yes, indirectly. Use the Send to Kindle web app or email-to-Kindle address. Amazon converts the EPUB to KFX server-side and delivers it to your Kindle via Wi-Fi — your device doesn't open EPUB directly but sees the converted file. This works on every Kindle that supports Send to Kindle, including older Paperwhite and Voyage models.

What about my existing MOBI files on a Kindle Paperwhite from 2018?

Existing MOBI files already on your Kindle continue to work — the Dec 2023 cutoff only affects new uploads via Send to Kindle. If you want to keep your library portable for any future device switch, convert your DRM-free MOBI to EPUB now and store both copies.

Is the conversion lossless? Why is the EPUB file size different from the MOBI?

It's effectively lossless for text and structure, but file sizes differ because the containers compress differently. EPUB uses ZIP compression on XHTML, while MOBI uses a PalmDOC-style binary. For text-heavy books EPUB is usually smaller; for image-heavy MOBIs the EPUB may be similar or slightly larger because images are re-packed but not re-encoded.

Will EPUB 2 or EPUB 3 be produced?

The output is EPUB 3, the current W3C standard. EPUB 3 is backward-compatible with EPUB 2 readers — older devices like first-generation Nooks or pre-2017 Kobos will still open it because EPUB 3 readers fall back gracefully on unsupported features.

Can Calibre do this locally instead?

Yes. Calibre (calibre-ebook.com) is the gold standard for local e-book conversion and library management — it's free, open-source, and handles bulk operations with metadata editing. xconvert is the right choice when you don't want to install software, are on a Chromebook or locked-down work machine, or only need to convert a handful of files quickly.

Does the converter handle Mobipocket.prc files or.azw3 files too?

This page is set up specifically for .mobi. For .azw3 (the KF8 variant), Amazon publishes the file with a different extension but the same underlying container — rename to .mobi and most tools will read it. For full AZW3 or KFX support, use Calibre locally. xconvert also offers MOBI to PDF and PDF to EPUB for adjacent workflows.

Are my files private?

Yes. Uploads are processed on our servers and removed from xconvert's servers shortly after the job completes. Nothing is published, indexed, or shared. For maximum privacy on a DRM-free personal library, Calibre's offline conversion keeps files entirely on your machine.