The FBReader SDK is a library for creating your ebook reader. We use the library in FBReader, the app with dozens of millions of installs on Android and iOS. If you want to test how the files will look in your app, please install FBReader.

The library includes a rendering engine for text formats, i.e. ePub, fb2, mobi, etc. It does not include a PDF renderer.

The library is distributed in binary form. If you are interested in the source code license, contact us via email.

Platforms and releases

FBReader SDK is currently available for Android and iOS platforms. In the future, we consider releasing a pure C++ version with the graphical part in Qt6.

If you need SDK for another platform, please get in touch with us via email.

Latest updates

The SDK for Android was updated on 30 November 2023. The major update introduces the possibility of continuous text scrolling and brings many other fixes. The latest FBReader versions (3.5 series, as well as 4.0 beta series) are based on this SDK.

The SDK for iOS was updated on 9 October 2023. The samples include the almost complete code of FBReader 1.1.9, which is available on the App Store. The cloud sync feature is removed.