Guide

EPUB to Kindle: how to send an EPUB file to your Kindle

You can put an EPUB on a Kindle without converting it: Amazon's Send to Kindle accepts EPUB files. Upload it on the Send to Kindle website or app, or email it to your Kindle's address, and it appears in your Kindle library on every device.

Here are the four ways to send it, the limits on each, and what the error messages mean when a book doesn't arrive. Facts are from Amazon's own help pages, checked on 2 November 2026.

Four ways to send an EPUB to a Kindle

The Send to Kindle website. Sign in at amazon.com/sendtokindle and drag the EPUB in. This is the roomiest route: files up to 200 MB.
The desktop app for Windows or Mac. Install Amazon's Send to Kindle app, add the EPUB to it and choose the Kindle to send it to.
The Kindle app on a phone or tablet. Share the EPUB to the Kindle app from your Files app or a download.
Email. Every Kindle and Kindle app has its own Send to Kindle email address. Attach the EPUB and send it from an address on your approved list. Each attachment can be up to 50 MB, with up to 25 files in one email.

To find your Kindle's address or approve a sender, sign in at amazon.com/mycd, open Preferences, then Personal Document Settings. Mail from an address that isn't on the Approved Personal Document E-mail List is not delivered.

When the book doesn't arrive

Amazon emails an error code. The ones you are most likely to meet with an EPUB:

E999: an internal error on Amazon's side, or maintenance. Wait a while and send it again.
E013: the book was delivered, but parts of it (audio, video, some SVG images, equations or gradient images) couldn't be converted for the Kindle, so some newer features are missing.
E016: the file couldn't be made reflowable and arrived in its original layout, so you can't change the text size.
E004: the file is password-protected or encrypted. DRM-protected books can't be sent.
E014: the sender's address isn't on your approved list (see above).

If your book isn't an EPUB yet

Send to Kindle no longer lists MOBI among the formats it takes, so an old .mobi file should become an EPUB first: use MOBI to EPUB. A PDF can be sent as it is, but it stays a fixed page on the Kindle's small screen; converting it to EPUB first makes it reflow, as our PDF to Kindle guide explains. For a Kindle that never goes online, copy an AZW3 file over a USB cable instead.

Questions

Do I need to convert an EPUB to MOBI for my Kindle?

No. Send to Kindle accepts EPUB and converts it for your device. MOBI is only needed for copying to an old Kindle over a USB cable.

What is the file size limit?

200 MB on the Send to Kindle website, and 50 MB per attachment by email.

Can I send a book I bought from another store?

Only DRM-free EPUBs. Books locked to another store's account are refused.

Where is my Kindle's email address?

At amazon.com/mycd, under Preferences, Personal Document Settings. Each Kindle and Kindle app has its own.

Kindle and Send to Kindle are trademarks of Amazon.com, Inc. epubwise is not affiliated with Amazon.