Tech riderRev. 3 Oct 2026
Thorium Reader
- 1Runs oniOS, Linux, Mac, Windows
- 2CostsFree plan
- 3Supported platformsWindows, macOS, Linux, iOS, iPadOS
- 4Supported formatsEPUB 2/3, Fixed Layout EPUB, PDF, DAISY 2.02/3, Web Publications
- 5Annotation toolsYes
- 6Offline readingYes
6 lines stated Written from the maker's own pages: thoriumreader.com
Overview
Thorium Reader is ranked #7 of 27 in ebook reader software on Specifiction. It runs on iOS, Linux, macOS, Windows. There is a free plan.
Thorium Reader plans and pricing
All plansCompared on ebook reader software
- Free plan
- Yesthoriumreader.com
- Supported platforms
- Windows, macOS, Linux, iOS, iPadOSthoriumreader.com
- Supported formats
- EPUB 2/3, Fixed Layout EPUB, PDF, DAISY 2.02/3, Web Publicationsthoriumreader.com
- Annotation tools
- Yesthoriumreader.com
- Offline reading
- Yesthoriumreader.com
Facts
- What it does
- Thorium Reader is a digital book reader and library for ebooks, audiobooks, comics, manga and documents.thoriumreader.com · 3 Oct 2026
- Reading controls
- Readers can adjust text size, themes and spacing, choose from 10+ fonts, and use keyboard navigation with custom shortcuts.thoriumreader.com · 3 Oct 2026
- Accessibility
- The site lists support for JAWS, NVDA, Narrator and VoiceOver; its iOS accessibility statement also describes known VoiceOver limitations for EPUB and PDF reading.thoriumreader.com · 3 Oct 2026
- Formats
- The reader supports EPUB, fixed-layout EPUB, PDF, several audiobook formats including MP3 and FLAC, and comics in CBZ, EPUB or PDF.thoriumreader.com · 3 Oct 2026
- DRM and retailers
- It opens Readium LCP-protected publications and DRM-free publications from compatible retailers.thoriumreader.com · 3 Oct 2026
- Libraries and free catalogs
- It can read compatible Readium LCP library downloads and content obtained from Project Gutenberg, LibriVox and other public-domain or openly licensed sources.thoriumreader.com · 3 Oct 2026
- Offline use
- Downloaded publications can be read or heard offline; LCP-protected files require an online connection at least once.thoriumreader.com · 3 Oct 2026
- Platforms and requirements
- It is available for iOS/iPadOS, Windows, macOS and Linux; the site lists iOS/iPadOS 26, Windows 10, macOS 12 Monterey, Ubuntu 18.04, Fedora 32 or Debian 10 as minimum versions.thoriumreader.com · 3 Oct 2026
- Desktop catalogs
- The desktop app can add and browse OPDS catalogs, subject to the catalog provider’s options.thoriumreader.com · 3 Oct 2026
- Desktop privacy and network use
- The desktop specification says the app collects no personal data, while describing anonymized telemetry and version checks when network access is available.thoriumreader.com · 3 Oct 2026
- Security assurances
- The desktop specification says ISO 27001 and SOC 2 Type II assurances apply to content providers’ services, not to Thorium Reader itself.thoriumreader.com · 3 Oct 2026
- Support
- The maker links to a Help Desk and Discord; the desktop specification also points users to guides, a public issue tracker and support channels.thoriumreader.com · 3 Oct 2026
- Who it is for
- The desktop technical specification names the general public, with particular attention to heavy readers, library-goers and students.thoriumreader.com · 3 Oct 2026
- Maker
- Thorium Reader is developed by EDRLab, a Paris-based non-profit development laboratory created in 2015.edrlab.org · 3 Oct 2026
Company
- Headquarters
- Paris, Francethoriumreader.com · 28 Sept 2026
Best Thorium Reader alternatives
See all 20 All accessCh 01 Readest Free planAndroidiOS from $4.99/mo7.9 All accessCh 02 Libby Free planAndroidiOS Free to start7.7 All accessCh 03 FBReader Free planAndroidiOS Free to start7.6 All accessCh 04 Adobe Digital Editions Free planAndroidiOS Free to start7.3 All accessCh 05 ReadEra Free planAndroidiOS Free to start7.3 All accessCh 06 eBoox Free planAndroidiOS Free to start7.2
Where it ranks on Specifiction
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Sources
- thoriumreader.com/en/· checked 3 Oct 2026
- thoriumreader.com/en/legals/ios/accessibility-statement/· checked 3 Oct 2026
- thoriumreader.com/en/download/· checked 3 Oct 2026
- thoriumreader.com/en/legals/desktop/technical-spec/· checked 3 Oct 2026
- edrlab.org/about/· checked 3 Oct 2026
- thoriumreader.com· checked 28 Sept 2026