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Contact UsMOBI Support for eBooks Frequently Asked Questions
This page provides information about MOBI support and common concerns that might arise when publishing your eBooks through KDP.
Effective March 18, 2025, we will no longer support MOBI files for fixed-layout eBooks. This change completes our transition away from the MOBI format, as we previously ended support for MOBI files for reflowable books on August 1, 2021. For publishing new fixed-layout and reflowable eBooks, please use EPUB, DOCX or KPF files. For horizontal episodic manga, use JPG images or an EPUB file.
Effective March 18, 2025, we will no longer support MOBI files for fixed-layout eBooks. This change completes our transition away from the MOBI format, as we previously ended support for MOBI files for reflowable books on August 1, 2021. For publishing new fixed-layout and reflowable eBooks, please use EPUB, DOCX or KPF files. For horizontal episodic manga, use JPG images or an EPUB file.
Frequently Asked Questions
1. What are reflowable and fixed-layout eBooks?
Reflowable eBooks allow the reader to resize text and adapt to the screen sizes where customers read them to provide the best reading experience. Fixed-layout eBooks have a fixed page size, typically with image backgrounds where the size of the text cannot be adjusted.2. Why is Amazon ending support for publishing MOBI files?
We are constantly evaluating our product and service offerings to best serve our authors. We listened to your feedback and we are simplifying the way to create eBooks natively with Enhanced Typesetting while removing overheads associated with MOBI file creation. To create reflowable eBooks, use EPUB, KPF (Kindle Create, Kindle Previewer), or DOC/DOCX (Microsoft Word) files. For fixed-layout eBooks, use KPF (Kindle Create) files or EPUB, and for horizontal episodic manga (available for JP only), use EPUB files or JPG images.3. When should I stop providing MOBI files for eBooks?
We recommend to start providing EPUB, KPF files, or JPG images (only for JP horizontal episodic manga) for any new and/or updated version of your fixed-layout eBooks as soon as possible. Effective March 18, 2025, we will stop accepting MOBI files.4. Do I have to provide EPUB versions of all of my previously published eBooks?
No, this change only applies to new uploads, i.e, new eBooks or revisions to previously published eBooks. No action is required for previously published eBooks that are not being updated.5. How can I create fixed-layout books in recommended format (EPUB or KPF)?
To create fixed-layout eBooks in the accepted formats, check our Prepare Comic and Kids’ eBooks with Kindle Create Help page. If you’re publishing in JP and want to learn about how to create horizontal episodic manga in the recommended format (EPUB files and JPG images) check our Getting Started - Indie Manga Help page.6. How can I create reflowable books in recommended format (EPUB, DOCX, KPF)?
To learn how to create reflowable eBook files in the accepted formats, see the section below on Creating reflowable eBook files.7. Does Amazon have a mandatory requirement for the EPUB format, like EPUB 2.0 or EPUB 3.0?
No, Amazon accepts both EPUB 2.0 and EPUB 3.0 files that meet the specifications outlined in Kindle Publishing Guidelines. You can continue using EPUB files that are created with the specifications for fixed-layout content, including children's books with text-pop ups.8. How can I test my eBook before publication?
The best way to test an eBook before publishing is with Kindle Previewer or KDP Online Previewer. You can also use the built-in previewer to test your books if you use Kindle Create.9. Will customers receive an updated version of my eBook if I re-upload an EPUB file?
No. Kindle processes both EPUB and MOBI files the same way, and the customer receives a file based on the capabilities of the device they are reading on.10. Will this change have impact in royalty calculations?
No, this change does not have an impact in royalty calculations.11. How can I preview my eBook in my Kindle device?
To preview your eBook in your Kindle device:
- Download the HTML of your converted book in the Preview on your Kindle device dropdown.
- This will download a .ZIP file to your computer, rename this .ZIP file to a .EPUB. Follow these instructions on how to rename your file for Mac or Windows.
- Send the exported file to your Send-to-Kindle-e-mail address to view on your Kindle. Note: Features and quality for personal files sent through email will be different from the file received by readers. To learn more about sending files to Kindle via email, visit the Send to Kindle for email page.
If you're uploading a fixed-layout eBook with Guided View or a textbook with interactive features, those features won't display in the Online Previewer. You'll need to use the Kindle Create previewer or download Kindle Previewer, which will also allow you to see how your book will look with enhanced typesetting conversion. This will provide the most up to date previewing experience and show enhanced typesetting features.
Creating fixed-layout eBook files in KPF and EPUB
- For Kindle Create (KPF) files, see our Kindle Create help page.
- For EPUB files:
- If you worked with a professional formatter to prepare your eBook, please ask them for an EPUB file that can be uploaded on kdp.amazon.com that meets our specifications outlined in Kindle Publishing Guidelines.
- If you used a formatting application to prepare your eBook, export the file in EPUB format and upload it on kdp.amazon.com.
Creating reflowable eBook files in EPUB, DOCX, KPF
- For Word (DOCX) files, see our KDP eBook Manuscript formatting guide.
- For Kindle Create (KPF) files, see our Kindle Create help page.
- For EPUB files:
- If you worked with a professional formatter to prepare your eBook, please ask them for an EPUB file that can be uploaded on kdp.amazon.com that meets our specifications outlined in Kindle Publishing Guidelines.
- If you used a formatting application to prepare your eBook, export the file in EPUB format and upload it on kdp.amazon.com. Find below directions on how you can export your eBook as EPUB using popular applications:
- Vellum: Vellum generates Kindle ready EPUB files when you generate your ebooks. The Kindle generate option produces a Kindle ready EPUB file. You can find more information on these help pages:
- https://help.vellum.pub/generating/
- https://help.vellum.pub/generating/kindle-ebook-format/
- Scrivener: You can use the EPUB3 or EPUB2 options when compiling your file. Watch this video explaining various compilation options in Scrivener.
- Sigil: Sigil uses the EPUB format to save files. You can use the EPUB files to publish on KDP. For more information, refer to the Sigil user guide.
- Reedsy: Use the exported EPUB file for publishing on KDP. To export the EPUB file, you can refer the Reedsy tutorial video.
- Jutoh: To create and EPUB file for publishing, you an click on File Menu -> Export -> EPUB.
- Vellum: Vellum generates Kindle ready EPUB files when you generate your ebooks. The Kindle generate option produces a Kindle ready EPUB file. You can find more information on these help pages:
