Free · Private · In your browser
EPUB Reader
Open an EPUB and start reading straight away, right in your browser. Nothing is uploaded, ever.
Files never uploaded Works offline Free, no signup No file size limits
How it works
- Drop your EPUB into the box above.
- It opens instantly, rendered right here in your browser – no upload, because nothing is sent anywhere.
- Read with adjustable text size and a chapter list. Close the tab and nothing is left behind.
Why “no upload” matters
Every conventional converter site works the same way: your file travels to their server, sits in their queue, gets converted on their hardware, and – you hope – gets deleted afterwards. You can’t verify any of it. The FBI has even warned about free converter sites that use that upload as a way to deliver malware or harvest the documents themselves. Your books are yours; a format change shouldn’t require handing them to a stranger.
ebook.tools removes the question entirely. The converter is delivered to your browser as code and runs on your machine; the file you drop is opened from memory, transformed, and saved back – the network isn’t involved at all. That isn’t a policy promise, it’s an architecture, and you can test it: load this page, switch off your wifi, and convert. It works exactly the same, because there was never anything to send.
A private EPUB reader that keeps your books on your device
Most "read EPUB online" sites work the way every online converter does: you upload your book to a server you don't control, it renders there, and you hope it's deleted afterwards. For a personal library, a manuscript, or a review copy, that trade is worse than it sounds. This reader never makes it. Your EPUB is opened and rendered entirely on your own machine, the same way every tool on ebook.tools works, so the file never travels anywhere.
Opening a book here unpacks the EPUB, reads its spine and table of contents, and displays one chapter at a time with a contents list you can jump around in. Text resizes to whatever is comfortable, the layout reflows to your screen, and it respects your system's light or dark theme. Because everything runs locally, the second book you open works even with the network switched off – the honest proof that nothing was ever being sent.
There is a real security story here too, and it is a feature rather than fine print. An EPUB is a bundle of HTML, and HTML can carry scripts, tracking pixels, and links that quietly phone home. Each chapter is rendered inside a locked-down sandbox with no scripting and no network access at all: images, fonts and styles from inside the book are inlined so they display, while anything that would reach out to the internet is stripped. A book cannot run code or leak that you opened it.
Kobo .kepub files are ordinary EPUBs with extra markup, so they open here too. If your book is a MOBI, AZW3 or PDF, convert it to EPUB first – the MOBI to EPUB converter and its siblings hand the result straight over. And if a book looks broken, the EPUB validator will tell you why. As with everything here, DRM-locked store purchases cannot be opened: we detect them and say so, rather than failing silently.