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Matter Reader

Matter Reader

Matter Reader is an open source ebook reader, converter, and manager that supports a wide variety of ebook formats. It is a free, cross-platform alternative to proprietary ebook readers.
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Matter Reader: Open Source Ebook Reader

Free, cross-platform ebook reader, converter, and manager supporting various ebook formats, an open source alternative to proprietary readers

What is Matter Reader?

Matter Reader is a free, open source ebook manager and ebook reader application for Windows, Linux and macOS. It supports common ebook formats like EPUB, MOBI, PDF, DJVU as well as comic book archives like CBZ and CBR.

As an ebook reader, Matter Reader provides key features like library management, metadata editing, bookmarks, highlights, annotations and more. It has a customizable user interface with multiple reading modes and themes for a comfortable reading experience.

In addition to reading ebooks, Matter Reader includes extensive ebook conversion support between formats. It allows for batch conversion of files and can connect to cloud storage services like Dropbox and Google Drive for directly adding and converting files.

Matter Reader also offers integration with third-party services like Goodreads and ReadFlow. It has good support for organization features including hierarchial bookshelves, virtual libraries, customized columns and filtering.

Overall, Matter Reader aims to be a comprehensive and free, open source alternative to platform-locked commercial ebook reader apps. With its extensive support for multiple formats and conversion, it is ideal for dealing with large ebook collections from varied sources.

Matter Reader Features

Features

  1. Supports EPUB, MOBI, AZW, PDF and other ebook formats
  2. Customizable interface and reading options
  3. Library management and search
  4. Annotation and bookmarking
  5. Sync across devices
  6. Text-to-speech
  7. Dictionary lookup
  8. Export highlights and notes
  9. Dark mode

Pricing

  • Open Source

Pros

Free and open source

Cross-platform compatibility

Support for DRM-free ebooks

Highly customizable

Active development and user community

Cons

Limited support for DRM ebooks

Less polished than some commercial apps

Lacks some advanced features of paid apps

Official Links

Official Website
https://getmatter.com

Reviews & Ratings

Login to Review
4.3
★ ★ ★ ★ ★

4 reviews

Rating Breakdown
Ease of Use
★ ★ ★ ★ ★ 4.0
Features
★ ★ ★ ★ ★ 4.8
Value for Money
★ ★ ★ ★ ★ 5.0
Customer Support
★ ★ ★ ★ ★ 3.3
Overall Experience
★ ★ ★ ★ ★ 4.5
Recent Reviews
shall1083
Skyler Hall
Mar 30, 2026
★ ★ ★ ★ ★
A Lifesaver for My Digital Library

Matter Reader has completely changed how I manage my digital library. The ability to convert between formats so seamlessly has saved me countless hours, and the support for so many formats means I can finally get all my e-books in …

mwhite9090
Michael White
Mar 27, 2026
★ ★ ★ ★ ★
A Must-Have for Digital Readers

Matter Reader has completely changed how I manage my ebook collection. I was able to easily convert and organize all my ebooks, regardless of format, and the interface is both intuitive and highly customizable. The fact that it's free and …

river_taylor52
River Taylor
Mar 13, 2026
★ ★ ★ ★ ★
A Free Powerhouse with Some Rough Edges

I really appreciate that Matter Reader is a free, open-source tool that handles formats like EPUB, MOBI, and PDF all in one place. However, the interface feels a bit dated and clunky compared to some commercial readers, and I've encountered …

oliviatech315
Olivia Chen
Mar 12, 2026
★ ★ ★ ★ ★
A Librarian's Dream Come True

As an avid reader with a massive, messy collection across ePub, PDF, and even old MOBI files, Matter Reader has been a lifesaver. Its library management is fantastic, letting me finally organize everything with custom tags and collections. The built-in …

View All Reviews (4)
Rating Distribution
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2
4
1
3
1
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