Open EPUB files online
EPUB is the open e-book standard — reflowable chapters that adapt to any screen size, used by most e-readers except Kindle.
Drop a EPUB file to open it
or click to choose — everything stays on your device
Choose file🔒 100% private — files never leave your browser
Or turn EPUB into an image — snapshot the preview, add arrows or notes, and download a PNG.
What is a EPUB file?
EPUB is the open e-book standard — reflowable chapters that adapt to any screen size, used by most e-readers except Kindle. The .EPUB extension identifies a Electronic Publication file, which is served with the application/epub+zip 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 EPUB files in desktop apps such as Apple Books, Calibre, Google Play Books — but here all you need is a web browser.
Quick facts
| Format | EPUB — Electronic Publication |
|---|---|
| File extensions | .epub |
| MIME type | application/epub+zip |
| Developer | IDPF / W3C |
| Category | E-books & comics |
| Also opens in | Apple Books, Calibre, Google Play Books |
How to open a EPUB file online
- Click Choose file above, or drag your EPUB 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 EPUB in the browser
This viewer is built entirely with open-source JavaScript that runs in your browser:
Frequently asked questions
What is a .EPUB file?
A .EPUB file is a Electronic Publication, identified by the application/epub+zip media type. You can open and read it instantly in the viewer above without installing anything.
What programs open EPUB files?
On the desktop, EPUB files typically open in Apple Books, Calibre, Google Play Books. Online, this page opens them in any modern browser — nothing to download.
How do I convert EPUB to an image?
Use Snapshot to capture the EPUB preview, optionally add arrows, text or highlights, then download it as a PNG image.
Is it safe to open my EPUB 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 EPUB 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.