EPUB reader for Chrome

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What is Readium?

Readium is a popular Chrome extension by This extension has 623,068 weekly active users, a good user rating of 4.01, and is most similar to Readium and Cloud Library. The latest version, 2.31.1, was updated 4 years ago.

Stats date:
Rating: 4.01 (1,865)
Version: 2.31.1 (Last updated: 2018-10-18)
Creation date: 2018-10-18
Manifest version: 2
  • storage
  • unlimitedStorage
  • app.window.fullscreen
Size: 2.18M
Risk impact: Low risk impact
Risk likelihood: Very low risk likelihood
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Other platforms

Not available on Firefox
Not available on Edge

ChromeStats Rank

EPUB Reader for Chrome
Readium for Chrome is the Google Chrome application based on ReadiumJS, an open source 
reading system and JavaScript library for displaying EPUB® publications in web browsers. ReadiumJS is a
project of the Readium Foundation. EPUB is a widely adopted portable document format based on Web 
standards such as HTML5, CSS, JavaScript, and SVG. EPUB is a registered trademark of a registered trademark of W3C ® (MIT, ERCIM, Keio, Beihang).

Improvements and Enhancements in this Release
IMPORTANT:  This release, 2.31.0 is the final release of the Readium Chrome Application.  As Google has deprecated Chrome apps, this app is longer actively supported, and will no longer be updated after the 0.31, October 01, 2018 release.  A list of other apps that are powered by Readium can be found at [](

Full release notes can be found here:
Risk impact

Readium requires very minimum permissions and is relatively safe to use.

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypass your security settings, and access your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Risk likelihood

Readium has earned a good reputation and can be trusted.

Risk likelihood measures the probability that a Chrome extension may turn malicious. This is determined by the publisher and the Chrome extension reputation on Chrome Web Store, the amount of time the Chrome extension has been around, and other signals about the Chrome extension. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Chrome extension, especially ones with higher risk impact and/or higher risk likelihood.

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