日本語で読みたい方は、日本語トップページからどうぞ。

🇯🇵 日本語ページはこちら
Browser EPUB Reader

Pick up where you left off, anytime.
A browser reader
where everything syncs

The page you were reading on your phone is ready when you open your PC.
Your cloud connects your bookshelf across devices.

Try it free See features
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See it in action

Pain Points

Sound familiar?
Common reading friction

📱 ↔ 💻

Locked to one OS

You're reading on your iPhone, but want to continue on your PC or Android. Your current app doesn't sync across platforms.

Slow loading for large EPUBs

Opening a large file means a long wait every time. You lose focus before you even reach the chapter you want.

🔀

Progress scattered everywhere

With multiple reader apps, you've lost track of where you left off. Bookmarks and progress are fragmented.

Four core features
that solve it all

Performance

Zero-wait streaming

Only the chapter you need is fetched on demand. Even 200+ MB EPUBs start rendering the moment you open the page.

Vocabulary

Effortless vocabulary building

Save words you look up during reading to your personal word bank with a single tap. Master them with SRS flashcards that optimize review timing based on the forgetting curve.

Sync

Seamless cross-device sync

Phone, tablet, or desktop — just log in from any browser to pick up where you left off. Reading position, settings, and everything stay in sync via the cloud.

Typography

Vertical and horizontal reading

Adjust fonts, text size, and line spacing to your preference. Enjoy a native vertical-writing layout optimised for Japanese books — right in the browser.

How it Works

Three steps to start reading

01

Log in

One click with Google OAuth. No lengthy sign-up process.

02

Add your EPUB

Upload a book to your shelf. Come back to it anytime.

03

Read and keep going

Your position and reading state stay connected across devices.

Frequently asked questions

Do you support DRM-protected EPUB? +

No. DRM-protected EPUB files are not supported.

Can I increase storage capacity? +
Which browsers are supported? +

Latest Chrome, Firefox, and Safari on desktop. Chrome for Android and Safari on iOS for mobile.

Can I download uploaded EPUB files? +

No. We do not support downloads, and we do not plan to add this feature.

Bring your reading flow
into one place

From bookshelf management to reading continuity. All in BlueReader.

Start reading in your browser