How do I send an EPUB to my Kindle?

Six methods work: (1) Upload at amazon.com/sendtokindle; (2) Email the EPUB to your @kindle.com address from an approved sender; (3) Share it to the Send to Kindle iOS or Android app; (4) Right-click it in the Send to Kindle desktop app on Mac or Windows; (5) Copy it to the documents folder over USB — no internet needed but no cloud backup; (6) Send it from Calibre, which converts to AZW3 for older Kindles. The first four deliver over Wi-Fi within minutes.

What is my Kindle email address?

Your Kindle email is in the format yourname@kindle.com. Find it in: Kindle app → More → Settings → My Account → Send-to-Kindle Email, or on Amazon's website at Manage Your Content and Devices → Devices → select your Kindle → Send-to-Kindle Email. You must add your sender email to Amazon's approved sender list before emailing files.

Does Kindle accept EPUB files?

Yes. Since late 2022, the Send to Kindle service accepts EPUB files directly. Email an EPUB to your @kindle.com address or use the Send to Kindle website or app. Amazon converts the EPUB to its internal KFX format and delivers it to your device via Wi-Fi. MOBI is no longer accepted by Send to Kindle.

What is the file size limit for Send to Kindle?

50 MB per attachment when emailing to your @kindle.com address; 200 MB per file through the Send to Kindle website, desktop app and mobile app. USB transfer has no limit beyond the Kindle's storage. Most EPUBs converted from PDFs are 1–5 MB; for image-heavy files over 200 MB, use USB or reduce image quality before conversion.

How to Send an EPUB to Your Kindle — Email, App, Website, USB and Calibre

Amazon added native EPUB support to Kindle in September 2022. You no longer need to convert to MOBI — you can send an EPUB directly to any Kindle device or the Kindle app. Here is every way to do it, from the one-click website to a cable.

Method 1: Send to Kindle website (easiest)

Go to amazon.com/sendtokindle
Sign in with your Amazon account
Click Select file and choose your EPUB
Choose which Kindle device to send it to
Click Send

The EPUB appears in your Kindle library within a minute or two. Works from any browser — no app needed.

File size limit: 200 MB per file. Most EPUBs are well under 10 MB.

Method 2: Send to Kindle email address

Every Kindle device has a personal email address (e.g., yourname_abc@kindle.com).

Find your Kindle email: sign in to Amazon → Manage Your Content and Devices → Devices tab → click your Kindle → find Send-to-Kindle Email
From your email client, compose a new message to that address
Attach the EPUB file
Subject line does not matter — leave it blank or write anything
Send the email from an address that is on your approved sender list

Approved sender list: Go to Manage Your Content and Devices → Preferences → Personal Document Settings → add your sending email address to the Approved Personal Document Email List.

Method 3: Send to Kindle iOS/Android app

Download the Send to Kindle app (free — separate from the Kindle reading app)
On iOS: share the EPUB from any app (Files, Mail, etc.) → tap Share → Send to Kindle
On Android: open the EPUB in Files, tap Share, then select Send to Kindle
Choose your device and tap Send

Method 4: Send to Kindle desktop app (Mac/Windows)

Download the free Send to Kindle app from amazon.com/sendtokindle and sign in
Right-click any EPUB → Send to Kindle, or drag the file onto the app window
Choose the destination device and click Send

Fastest option once installed — no email, no browser. Same 200 MB per-file limit as the website.

Method 5: USB cable (no internet, no size limit)

Connect the Kindle to your computer (USB-C on 2021-and-later models, micro-USB on older ones) and tap Allow on the Kindle if asked to trust the computer
Open the Kindle drive in Finder or File Explorer
Copy the EPUB into the documents folder
Eject safely — the book appears in your library immediately

USB needs no Amazon account and has no file size limit beyond the Kindle's storage, but books copied this way are not backed up to Amazon's cloud and will not follow you to a new Kindle. Kindle firmware also indexes a bare .epub inconsistently: if it does not show up, convert it to AZW3 with Calibre first (ebook-convert book.epub book.azw3) — which is also the only route for pre-2018 Kindles that never received EPUB support.

Method 6: Calibre

If you already manage your library in Calibre, connect the Kindle over USB and click Send to device; Calibre converts to AZW3 on the fly when a device needs it. Calibre's wireless device connection (Connect/Share → Connect to Kindle via Wi-Fi) works too, but Send to Kindle is simpler for a single book.

Which method should you use?

Method	Install needed	File size limit	Needs internet	Backed up to Amazon cloud
Website (amazon.com/sendtokindle)	No	200 MB	Yes	Yes
Email to @kindle.com	No	50 MB per attachment	Yes	Yes
iOS/Android app	Yes (small)	200 MB	Yes	Yes
Desktop app	Yes (small)	200 MB	Yes	Yes
USB cable	No	None	No	No
Calibre	Yes	None	Optional	No

For a single EPUB under 200 MB the website is hard to beat. Email is handy from a phone. USB is for huge files, no Wi-Fi, or Kindles too old for Send to Kindle.

What formats does Kindle accept?

As of 2022, Kindle Personal Documents Service accepts:

EPUB (.epub) — now fully supported
PDF (.pdf) — works but fixed layout, no reflow
MOBI (.mobi) — old format, still accepted
DOC/DOCX, HTML, RTF, TXT

EPUB is the best format to send — Kindle converts it internally to its AZW3 format and the result looks like a native Kindle book with adjustable fonts and dark mode.

PDF vs EPUB on Kindle: why EPUB is better

If you have a PDF and want to read it comfortably on your Kindle, convert it to EPUB first. When you send a PDF to Kindle:

Text is fixed-size — you cannot adjust the font size
Two-column academic papers stay two-column and tiny
Kindle's "Enhanced Typesetting" and Word Wise features do not apply

When you send an EPUB to Kindle:

Full font size and typeface control
Dark mode, Sepia mode, and custom margins
Kindles Bookerly font, page turns, progress indicator — all work correctly

How to convert a PDF to EPUB before sending to Kindle

Go to toolkit.bot/pdf2epub — free, no account, no install
Upload your PDF — conversion takes 15–60 seconds
Download the EPUB
Send to Kindle using any method above

The converted EPUB handles two-column layouts, scanned PDFs (via OCR), footnotes, and heading structure — all of which display correctly on Kindle.

Convert your PDF to EPUB — then send it to Kindle in one click.

Convert PDF to EPUB →