How to Send EPUB Books to Your Kindle (3 Easy Ways)

Kindle has supported EPUB since 2022, but you can't copy the file over USB and expect it to open. Every EPUB has to go through Amazon's Send to Kindle service, which converts it to Kindle's own format on the way in. Once you know that, the whole thing takes about a minute.

Here are the three ways to do it, plus a fourth for people with big libraries, and the one catch that bites highlighters like me.

Before you start

Three things save you a support ticket later:

  • The file must be DRM-free. An EPUB you bought from another store or borrowed from a library app usually carries DRM and will fail silently. EPUBs from Project Gutenberg, Standard Ebooks, indie authors, or your own exports work fine.
  • The book lands under "Docs", not "Books". Sent files are treated as personal documents. They read the same, but they live in a different shelf of your library.
  • MOBI is dead. Amazon dropped it from Send to Kindle when EPUB support arrived. If you have old MOBI files, convert them to EPUB first.

Way 1: Send to Kindle on the web (easiest)

Go to amazon.com/sendtokindle, sign in, and drag the EPUB into the browser window. Pick which device it goes to, click send, done. Files up to 200MB work, and there's nothing to install.

Your Kindle downloads the book the next time it's on Wi-Fi. If you're impatient, open Settings on the device and sync manually.

This is the method I'd give anyone. It works from any computer and never touches your email.

Way 2: Email it to your @kindle.com address

Every Kindle has its own email address. Send an EPUB to it as an attachment and the book shows up on the device.

Two steps of setup, one time only:

  1. Find your Kindle's address. On Amazon, go to Manage Your Content and Devices → Preferences → Personal Document Settings. Each device is listed with an address like yourname_123@kindle.com.
  2. Approve your own email. On the same page, add your personal email to the approved senders list. Amazon rejects mail from addresses it doesn't recognize, and it does it quietly.

After that, sending a book is just writing an email with an attachment. Handy when someone emails you an EPUB and you want it on your Kindle without a detour through a computer.

Way 3: From your phone's share sheet

If the EPUB is already on your phone, you don't need either of the above. Install the Kindle app, then tap the file in your downloads or your email, hit Share, and choose the Kindle icon. The app uploads it through Send to Kindle for you.

This is the fastest route for books you grab on the go. There's also a Send to Kindle desktop app for Mac and Windows that adds a right-click option, if you'd rather send from your file manager.

The USB exception: Calibre

Plain USB transfer fails because Kindle e-readers won't open a raw EPUB file. But if you have a large library, converting each book by hand gets old. Calibre, the free ebook manager, solves it: it converts EPUB to AZW3 (Kindle's native format) and copies books over USB in bulk, no cloud involved.

The trade-off is that USB-loaded books skip Amazon's cloud entirely. No sync of your reading position across devices, and no backup if the Kindle dies. For most people, Send to Kindle is less work. Calibre earns its keep when you're moving fifty books, not one.

When the book doesn't arrive

Almost every failed send comes down to one of these:

  • DRM. The file converts fine locally but never appears. Check where the EPUB came from.
  • Sender not approved. Emailed books from an address that isn't on your approved list vanish without an error.
  • Wrong device selected. Send to Kindle remembers your last choice. If you have a Kindle and the phone app, check it didn't go to the other one.
  • File too big. 200MB via the web uploader; email providers usually cap attachments around 25MB.
  • It's under "Docs". The book arrived, you're looking at the wrong shelf. Filter your library by Docs.

The highlights catch

Here's the part nobody tells you. Highlights you make in a sideloaded EPUB don't appear in your Kindle notebook. That page only shows books bought from the Kindle store. Your personal-document highlights are saved to a file on the device called My Clippings.txt.

They're not lost. Plug in your Kindle, and the file sits right in the root folder with every highlight and note you've made in sideloaded books. It's just ugly to read raw.

That's the gap Screvi fills. Drop your My Clippings.txt into the free clippings viewer to browse it instantly, or sync your Kindle highlights so every highlight, store-bought and sideloaded, ends up in one searchable library you can actually review. If you're still choosing what to read EPUBs on, I compared the best EPUB readers earlier this year.

Send the book, read it, highlight freely. Just know where the highlights go.