Thorium Reader overview

Thorium Reader is an easy to use EPUB reading application for Windows 10/10S, MacOS and Linux. After importing e-books from a directory or OPDS feed, you'll be able to read on any screen size, customize layout settings, navigate via the table of contents or page list, set bookmarks ... A great care is taken to ensure the accessibility of the application for visual impaired people using NVDA, JAWS or Narrator.

Free application. No ads. No private data flowing anywhere. Thorium is available in many languages and is accessible for visually impaired and dyslexic people.

This project is in constant evolution, corrections and new features will be added soon and your support is welcome for that. The application is based on the open-source Readium Desktop toolkit.

What’s new in version 2.2.0

Updated on Feb 03 2023

This release includes the following (notable) new features, improvements and bug fixes:

Updated translations: English, Simplified Chinese, Traditional Chinese, Italian, Japanese, Lithuanian, Spanish, Swedish
Now with Electron 21 (more recent Chromium web browser engine)
Feature: show accessibility metadata in publication info dialog
Fix: MathML support via MathJax, screen reader interaction (accessibility)
Feature: navigation history, back / forward buttons with keyboard shortcuts
Fix: TTS and Media Overlays playback options were reset to default values in GUI but not in backend
Fix: EPUB FXL Fixed-Layout pre-paginated publications can now render with single centered pages (override from authored spread rules, when aspect ratio is portrait instead of landscape)
Feature: EPUB FXL Fixed-Layout zoom now with keyboard shorcuts (increase, decrease and reset)
Fix: EPUB FXL and reflowable, support for pagebreak and pagelist edge cases, improved "goto page" navigation
Fix: support for self-closing body HTML tag in document parser
Fix: keyboard focus returns to popup menu callsite after cancel-closing publication delete modal dialog (improves usability and accessibility with screen readers)
Fix: improved popup modal dialog GUI, better default enter key behaviour and form submission behaviour
Fix: improved CSS styling in reader menu, removed non-implemented annotation menu (future feature)
Fix: OPDS HTTP basic authentication now handles 302 "found" redirection for GET requests
Fix: OPDS indirect acquisitions can have child subtype, now display EPUB/PDF and LCP info in download buttons (after generic authenticated borrow action)
Feature: OPDS edit feed title and url
Fix: tag name with special characters now supported
Fix: DAISY v2.02 HTML NCC metadata parsing, multimedia type full text audio is default
Feature: OPDS HTTP digest authentication scheme, supports Calibre content server
Fix: multilingual metadata parsing (title, author, etc.), RTL for Hebrew, Arabic, etc. now displayed correctly
Fix: URL protocol/scheme handlers thorium:// and opds:// work on Mac Linux and Windows
Fix: MacOS 'window' menu in top-level instead of submenu
Fix: accessible screen reader label for secondary navigation landmark in bookshelf is just "menu" to avoid duplication of announcement
Fix: added application keywords for Linux integration
Fix: clearer error reporting when opening a file with unsupported extension (derived from HTTP content-type or obtained from filesystem)
Fix: Mac and Linux application icons
Fix: cancelling one download only now works
Fix: publication info, list of authors now complete
Fix: OPDS, support for DAISY application/zip mimetype