winget install --id EDRLab.ThoriumAbout Thorium
Thorium Reader is the EPUB reader of choice for Windows 10 and 11, MacOS and Linux. This EDRLab application is in constant development and aims at becoming a reference for accessing EPUB 3 publications in reflow or fixed-layout format, audiobooks and visual narratives, PDF documents and DAISY 2.02 and 3 accessible ebooks, LCP protected or not. It is localised in a large set of languages, each version offering new locales. Massive efforts are also made to make Thorium Reader highly accessible for visually impaired a...
What's new in 3.4.0
Summary Version 3.4.0 was released on 08 April 2026. This release includes the following (notable) new features, improvements and bug fixes: - Upgraded to Electron v41, Chromium v146, NodeJS v24 - Updated translations - Fixed accessibility issues with screen reader heading hierarchy and keyboard tab cycling order - New feature: filtering and sorting directly in the publication "grid" mode of the library window (complements existing "table" view functionality) - New feature: favorite OPDS feed sorting - New feature: keyboard shortcut "export to HTML" function - Updated feature: the LCP passphrase input text field can now show unmasked clear text - Fixed OPDS "breadcrumb" user interface affordance - Fixed MathML support, MathJax could not be activated - Fixed a zoom issue with "fixed layout" / pre-paginated EPUBs - Fix in TTS readaloud and EPUB Media Overlays, the temporary disabling of popup footnotes wasn't being restored properly, as well as the notes highlights (annotations and bookmarks) - Fixed MacOS issue when bringing re-activating the application to bring the reader window into the foreground (over the library window) - Fixed "customization profiles" (new feature which was broken on Windows in version 3.3.0). Reminder: this feature offers an alternative to forking the Thorium Desktop codebase, via a plugin mechanism that declaratively expresses modifications to "vanilla" Thorium Desktop reader (color themes, bundled publications and feeds, application logo, etc.) - Fixed notification toasts which were sometimes incorrectly terminated - Fix: LCP passphrase prompt was...
Version history
| Version | Updated | Notes |
|---|---|---|
| 3.4.0 | Unknown | Summary Version 3.4.0 was released on 08 April 2026. This release includes the following (notable) new features, improvements and bug fixes: - Upgraded to Electron v41, Chromium v146, NodeJS v24 - Updated translations -... |
| 3.3.0 | Unknown | Summary Version 3.3.0 was released on 09 December 2025. THIS RELEASE FIXES A CRITICAL SECURITY BUG. There is no known exploit in the wild, but the risk does exist and must be taken seriously. It is therefore extremely re... |
| 3.2.2 | Unknown | Summary Version 3.2.2 was released on 19 August 2025 This release includes the following (notable) new features, improvements and bug fixes: - Upgraded to the Electron v37 revision which fixes the screen reader detection... |
| 3.2.1 | Unknown | Summary Version 3.2.1 was released on 11 August 2025 NOTE: version 3.2.0 was published as a pre-release with only Linux and Windows installers (MacOS was missing at that point). This pre-release was removed when a fixed-... |
| 3.1.0 | Unknown | Summary Version 3.1.0 was released on 17 February 2025. LINUX USERS (Ubuntu in particular): you will need to run the shell command sudo chmod 4755 /opt/Thorium/chrome-sandbox in a terminal session after installing the De... |
| 3.0.0 | Unknown | Summary Version 3.0.0 was released on 26 June 2024. Total Downloads This release includes the following (notable) new features, improvements and bug fixes: - Major user interface refresh / redesign - Support for dark/lig... |
| 2.4.2 | Unknown | Summary Version 2.4.2 was released on 17 May 2024.Total DownloadsThis release includes the following (notable) new features, improvements and bug fixes:- HOTFIX: LCP2 publications with obfuscated fonts or non-encrypted H... |
| 2.4.1 | Unknown | Summary Version 2.4.1 was released on 22 March 2024.Total DownloadsThis release includes the following (notable) new features, improvements and bug fixes:- HOTFIX: Some users experienced a regression bug in Thorium v2.4.... |
| 2.4.0 | Unknown | Summary Version 2.4.0 was released on 20 March 2024.Total DownloadsThis release includes the following (notable) new features, improvements and bug fixes:- New user interface locales: Slovenian/Slovenščina, and Danish/Da... |
| 2.3.0 | Unknown | - New and updated translations: Bulgarian, Greek, Croatian, Korean, Portuguese (Portugal). - Reader / image zoom: major feature update from initial proof of concept, better user experience (finger touch, trackpad gesture... |
| 2.2.0 | Unknown | 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... |
| 2.1.0 | Unknown | This release includes the following (notable) new features, improvements and bug fixes: - Added support for Dilicom library connector (not OPDS, special API). - Localisation: fixed French, Spanish, Portuguese (Portugal)... |