Librum

Sat, 16 Aug 2025 15:28:00 +0800

Librum-Reader/Librum

Librum

Librum is an application designed to make reading enjoyable and straightforward for everyone.

It’s not just an e-book reader. With Librum, you can manage your own online library and access it from any device anytime, anywhere. It has features like note-taking, AI tooling, and highlighting, while offering customization to make it as personal as you want!

Librum also provides free access to over 70,000 books and personal reading statistics while being free and completely open source.

Download Librum from our website!

Preview

Setup and manage your own online library

A simple and modern interface

Add your books to collections, tag them, and sort them in any way you want

Customize Librum to make it personal to you

Contributing

If you’d to support Librum’s development, check out: https://librumreader.com/contribute

All of the current feature requests, bugs and tasks are listed in the issues. Easy tasks are labeled “good first issue”, so that is a good starting point.

PS: Feel free to tag me (@DavidLazarescu) in the comments of any issue if you have questions.

Contact

For questions, you can reach us under: help@librumreader.com
For business related contact, reach out to us here: contact@librumreader.com

Donations

Donations make it possible for us to cover our server costs and allow us to make investments into new areas of development.
If you would like to support us, check out: https://librumreader.com/contribute/donate or become a Github sponsor!

As a team of opensource developers we rely on donations to continue working on projects like Librum. Your help is greatly appreciated.

Translations

Librum is currently available in the languages listed here

If you want to translate Librum to another language, follow the steps below:

Download this file
Rename the file to contain your language’s suffix, e.g. “librum_ru.ts” for Russian or “librum_de.ts” for German
Download the translation software (Qt Linguist) either for Windows from here or using the Qt Installer
Now start Qt Linguist, open the downloaded file, set the target language to the language you want to translate to and start translating. (Check out this guide for a quick overview of Qt Linguist)

Once you are done, create a pull request or open up an issue with your new translation file!
If you run into any problems, need guidance or have questions, feel free to reach out to us at: contact@librumreader.com

Notes:

Make sure that your translations are approximately the same length as the original text
Please carefully check for spelling mistakes (including punctuation and capitalization)

Documentation

For documentation go to Librum’s GitHub-wiki

Self-hosting

To self-host Librum you need to run Librum-Server locally (instructions can be found here) and tell the client to use your self-hosted server by:

(Linux) Editing ~/.config/Librum-Reader/Librum.conf and setting selfHosted=true and serverHost to your server’s url (e.g. serverHost=https://127.0.0.1:5001)
(Windows) Opening the registry editor (Press Win + R and search for regedit), navigating to HKEY_CURRENT_USER\Software\Librum-Reader\Librum and setting selfHosted=true and serverHost to your server’s url

Make sure to run the application before following the steps above, to generate the required files.

Details

Supported platforms

Part of Librum’s aim is to work on any platform. No matter where you are or which device you use, you can always continue your book with Librum, as it is cross platform.
We support:

Windows
GNU/Linux
MacOS
IOS (Coming Soon)
Android (Coming Soon)

Supported formats

Librum is the best choice for all kinds of books, since Librum supports all major book formats
including:

PDF
EPUB
CBZ (Comic books)
FB2
TIFF
Mobi
XPS
Images

And many more!

Features

Librum’s objective is to make your reading more productive; to that end, we provide you with a variety of features that you can access via a simple and straightforward interface.
These features include:

A modern e-reader
A personalized and customizable online library
Book meta-data editing
A free in-app bookstore with more than 70,000 books
Book syncing across all of your devices
Highlighting
Bookmarking
Text search
Unlimited customization
Fine-grained organization through Librum’s folder system
Note-taking (Coming Soon)
TTS (Coming Soon)
Personalized reading statistics (Coming Soon)

Want a new feature? Feel free to leave a feature request ticket!

Build Guide

Follow this guide to build Librum from source.

For GNU/Linux

Prerequisites

cmake (https://cmake.org/download)
make (http://ftp.gnu.org/gnu/make)
g++ (https://gcc.gnu.org)
python3-venv (on ubuntu use sudo apt install python3-venv)
Qt 6.5 (https://www.qt.io/download-open-source)

Installation

The installation is straight forward, just follow the steps below:

Clone the repository.

`1`	`git clone https://github.com/Librum-Reader/Librum.git --recursive`

Step into the cloned project folder.
1

cd Librum

Create the build folder and step into it.

1
2

mkdir build-Release
cd build-Release

Run cmake.
1

cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTS=Off -DCMAKE_PREFIX_PATH=<path/to/Qt> ..
Set CMAKE_PREFIX_PATH to your Qt installation path. Installing Qt via the online installer usually installs it to /home/<name>/Qt/<version>/gcc_64
Build the project
1

cmake --build . -j $(nproc)
Install Librum
1

cmake --install .

Troubleshooting

Here are solutions to some common errors. If your error is not listed here, please open an issue.

Error: Failed to find required Qt component "Quick".
Solution: Install the libGL mesa dev package, on ubuntu its sudo apt install libgl1-mesa-dev and on fedora its sudo dnf install mesa-libGL-devel.
Error: Could not load the qt platform plugin "xcb" even though it was found
Solution: Install the libxcb-cursor-dev, on ubuntu its sudo apt install libxcb-cursor-dev

For Windows

Prerequisites

cmake (https://cmake.org/download)
Visual Studio 19 (https://visualstudio.microsoft.com/de/vs/older-downloads)
Python (https://www.python.org/downloads)
Qt 6.5 (https://www.qt.io/download-open-source)

Installation

To build Librum on windows, run the following commands in the Powershell:

Clone the repository.

`1`	`git clone https://github.com/Librum-Reader/Librum.git --recursive`

Step into the cloned project folder.
1

cd Librum
Create the build folder and step into it.
1 2

mkdir build cd build
Run cmake.
1

cmake -DBUILD_TESTS=Off -DCMAKE_PREFIX_PATH=<path/to/qt> ..
Set CMAKE_PREFIX_PATH to your Qt installation path. Installing Qt via the online installer usually installs it to <Drive>\\Qt\\<version>\\msvc2019_64
Build the project
1

cmake --build . --config Release
Run the app
1

./librum

Additional Info

Here are some things to keep in mind during the build process.

Make sure to add cmake and the Qt binaries to the PATH environment variable
You need Visual Studio 2019, newer versions will not work
For the Qt installation, you only need to choose “MSVC 2019 64-bit”, you can untick everything else to reduce the download size

For MacOS

Prerequisites

cmake (https://cmake.org/download)
make (http://ftp.gnu.org/gnu/make)
g++ (https://gcc.gnu.org)
python3 (https://www.python.org/downloads)
Qt 6.5 (https://www.qt.io/download-open-source)

Installation

The installation is straight forward, just follow the steps below:

Clone the repository.

`1`	`git clone https://github.com/Librum-Reader/Librum.git --recursive`

Step into the cloned project folder.
1

cd Librum

Create the build folder and step into it.

1
2

mkdir build-Release
cd build-Release

Run cmake.
1

cmake -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTS=Off -DCMAKE_PREFIX_PATH=<path/to/Qt> ..
Set CMAKE_PREFIX_PATH to your Qt installation path. Installing Qt via the online installer usually installs it to /Users/<name>/Qt/<version>/macos
Build the project
1

cmake --build . -j $(nproc)
Install Librum
1

cmake --install

Note: Make sure to add /usr/local/lib to your DYLIB path, for MacOS to find the installed libraries by exporting DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:/usr/local/lib.

koreader

Wed, 07 May 2025 15:29:54 +0800

koreader/koreader

KOReader is a document viewer primarily aimed at e-ink readers.

Download • User guide • Wiki • Developer docs

Main features

portable: runs on embedded devices (Cervantes, Kindle, Kobo, PocketBook, reMarkable), Android and Linux computers. Developers can run a KOReader emulator in Linux and MacOS.
multi-format documents: supports fixed page formats (PDF, DjVu, CBT, CBZ) and reflowable e-book formats (EPUB, FB2, Mobi, DOC, RTF, HTML, CHM, TXT). Scanned PDF/DjVu documents can also be reflowed with the built-in K2pdfopt library. ZIP files are also supported for some formats.
full-featured reading: multi-lingual user interface with a highly customizable reader view and many typesetting options. You can set arbitrary page margins, override line spacing and choose external fonts and styles. It has multi-lingual hyphenation dictionaries bundled into the application.
integrated with calibre (search metadata, receive ebooks wirelessly, browse library via OPDS), Wallabag, Wikipedia, Google Translate and other content providers.
optimized for e-ink devices: custom UI without animation, with paginated menus, adjustable text contrast, and easy zoom to fit content or page in paged media.
extensible: via plugins
fast: on some older devices, it has been measured to have less than half the page-turn delay as the built in reading software.
and much more: look up words with StarDict dictionaries / Wikipedia, add your own online OPDS catalogs and RSS feeds, over-the-air software updates, an FTP client, an SSH server, …

Please check the user guide and the wiki to discover more features and to help us document them.

Screenshots

Installation

Please follow the model specific steps for your device:

Android • Cervantes • Kindle • Kobo • Linux • Pocketbook • reMarkable

Development

Setting up a build environment • Collaborating with Git • Building targets • Porting • Developer docs

Support

KOReader is developed and supported by volunteers all around the world. There are many ways you can help:

fix bugs and implement new features
translate the program into your language or improve an existing translation
document lesser-known features on the wiki
help others with your knowledge on the forum

Right now we only support liberapay donations.

E-Reader on Producthunt daily

Librum

Librum-Reader/Librum

Librum

Table of Contents

Preview

Contributing

Contact

Donations

Translations

Documentation

Self-hosting

Details

Supported platforms

Supported formats

Features

Build Guide

For GNU/Linux

Prerequisites

Installation

Troubleshooting

For Windows

Prerequisites

Installation

Additional Info

For MacOS

Prerequisites

Installation

koreader

koreader/koreader

KOReader is a document viewer primarily aimed at e-ink readers.

Main features

Screenshots

Installation

Development

Support

Contributors