Host an AZW3 file and share it as a link
Put a Kindle Format 8 ebook online at its own address — the format with proper formatting support on modern Kindles.
Drop your AZW3 file here
Any other file works too — up to 25.0 MB, or 100.0 MB for a whole site
Free to use. Your AZW3 file is live at your-name.99helpers.site in about ten seconds.
What is a .azw3 file?
AZW3, also called Kindle Format 8, is Amazon's successor to MOBI. It supports the HTML5 and CSS3 features MOBI lacked — proper typography, fixed layouts, embedded fonts — which is why illustrated and design-heavy ebooks need it.
What people use AZW3 files for
- Ebooks with real layout and typography
- Illustrated books and comics for Kindle
- Books converted from EPUB for Kindle readers
- Review copies sent directly to Kindle owners
What opens a AZW3 file
- Kindle devices and the Kindle app
- Calibre, for reading and converting
- Kindle Previewer, from Amazon
How to host a AZW3 file
- 1
Drop your AZW3 file in
Drag it onto the box at the top of this page, or click to choose it. Files up to 25 MB are supported, and nothing is uploaded until you publish.
- 2
Pick an address
Type a name and we'll tell you straight away whether it's free. That becomes the link: my-book-kindle.99helpers.site
- 3
Publish and share
Create a free account — that step exists so the file is yours to update, replace or delete — and the link is live within seconds.
The same three steps work for any file — see how file hosting works on 99helpers.com.
What happens when someone opens the link
The file downloads, then transfers to a Kindle by USB or Send to Kindle.
Why host a AZW3 file instead of emailing it?
Getting a review copy to a reader shouldn't require a store or a sign-in. A link lets them download it and side-load it themselves, and it doesn't expire the way transfer services do.
Worth knowing before you publish
- Host an EPUB alongside — it's the open standard, works on every non-Kindle reader, and Amazon accepts it.
- Calibre converts EPUB to AZW3 in seconds and preserves layout well.
- Amazon's Kindle Previewer is worth a check before distributing, since it shows how the book actually renders.
AZW3 hosting questions
- AZW3 or MOBI for a Kindle?
- AZW3 — it supports modern formatting that MOBI can't handle. MOBI is legacy, and Amazon has moved on from it.
- How do readers get it onto a Kindle?
- Download the file, then transfer by USB or through Send to Kindle. Both work with AZW3.
- Should I offer EPUB too?
- Yes — EPUB covers every non-Kindle reader and is what Amazon now prefers as well. Hosting both means nobody is stuck.
Put your AZW3 file online now
It takes about ten seconds, and you only make an account once the file is ready to go live.
Hosting guides for related formats
AZW3 is one of over 211 formats you can host — see free file hosting for any file type for the full list, or read the hosting guides for other file types.