Open MOBI files online
MOBI and AZW3 are Amazon Kindle e-book formats. foliate-js can render them partially in the browser.
Drop a MOBI file to open it
or click to choose — everything stays on your device
Choose file🔒 100% private — files never leave your browser
What is a MOBI file?
MOBI and AZW3 are Amazon Kindle e-book formats. foliate-js can render them partially in the browser. The .MOBI extension identifies a Mobipocket eBook file, which is served with the application/x-mobipocket-ebook media type. You can open it here instantly — drop the file into the box above and it renders in your browser. Nothing is uploaded.
Besides this free online viewer, you can open MOBI / AZW3 files in desktop apps such as Amazon Kindle, Calibre — but here all you need is a web browser.
Quick facts
| Format | MOBI / AZW3 — Mobipocket eBook |
|---|---|
| File extensions | .mobi .azw3 |
| MIME type | application/x-mobipocket-ebook |
| Developer | Amazon / Mobipocket |
| Category | E-books & comics |
| Also opens in | Amazon Kindle, Calibre |
How to open a MOBI file online
- Click Choose file above, or drag your MOBI file onto the box.
- The right viewer loads automatically and renders your file.
- Read, scroll or page through it. To open a different file, choose Open another file.
100% private — files never leave your browser.
Libraries used to render MOBI in the browser
This viewer is built entirely with open-source JavaScript that runs in your browser:
Frequently asked questions
What is a .MOBI file?
A .MOBI file is a Mobipocket eBook, identified by the application/x-mobipocket-ebook media type. You can open and read it instantly in the viewer above without installing anything.
What programs open MOBI files?
On the desktop, MOBI files typically open in Amazon Kindle, Calibre. Online, this page opens them in any modern browser — nothing to download.
Is it safe to open my MOBI file here?
Yes. The file is read and rendered entirely by JavaScript inside your own browser. It is never uploaded to a server, so nothing leaves your device.
Do I need to install anything to view a MOBI file?
No. There is nothing to install and no account to create. Open the page, drop your file, and it displays instantly.
Does it work on my phone or iPad?
Yes. The viewer is fully responsive and works in modern mobile and tablet browsers such as Safari and Chrome.
Is there a file size limit?
There is no hard limit, but very large files depend on your device’s memory. Big files are processed in the background so the page stays responsive.