Koodo Reader

Koodo Reader 2.4.6

All-in-one ebook reader

  • By App by Troye
  • Open Source
  • Updated Oct 7, 2026
Download for Windows

About Koodo Reader

Koodo Reader is an all-in-one eBook reader for Windows, macOS, Linux, and the web, supporting over 15 formats.

What's new in 2.4.6

New Features
- The table of content now displays the number of pages by default; there is no need to enable the “Total Pages” feature separately.
- Software security has been optimized to address an arbitrary code execution vulnerability caused by metadata.
- An additional confirmation step has been added when importing books via external links using the URL scheme to enhance security.
- The “Ask AI” feature now supports the Ctrl + Enter shortcut for submitting questions.
- Added an eraser tool to Doodle Mode
- Added support for 7 languages on the official website
- (Mobile) Added a feature to resync all book covers; go to Settings > Sync options
- (Mobile) Optimized the smoothness of page-turning animations
- (Mobile) Optimized the smoothness of certain app animations
- (Mobile) Added an option to download images in CBZ comic mode
Fixes
- Fixed an issue where footnotes in some books did not appear in a pop-up window
- Fixed an issue where reading progress could not be tracked for some books containing special styles
- Fixed an issue where table of contents highlighting did not work after enabling “Total Pages”
- Fixed an issue where page numbers were not displayed in the table of contents for some TXT books
- (Mobile) Fixed an issue where authorization via the browser failed on older iOS versions, resulting in a blank page
- (Mobile Version) Fixed abnormal slider behavior on iOS
- (Mobile Version) Fixed an issue where swiping on an image triggered image preview in scroll mode
- (Mobile Version) Fixed an issue where text could not be selected in the Android version after enabling recommended layout under certain conditions
- (Mobile Version) Fixed stuttering issues when enabling TTS for some book
- (Mobile) Fixed an issue on iOS where the horizontal bar in the bottom navigation bar did not automatically hide during reading
- (Mobile) Fixed an issue where footnotes for some books did not appear in a pop-up window
- (Mobile) Fixed an issue where reading progress could not be tracked for some books containing special styles
- (Mobile) Fixed an issue where page numbers were not displayed on the table of contents for some TXT books
Tip
You can also download the installation package for this version from the our self-hosted mirror.

Full release notes »

Technical details

PublisherApp by Troye
AuthorTroye
Version2.4.6
Release date2026-10-07
LicenseAGPL-3.0
Installer typenullsoft
Architecturex64, arm64
Package IDAppByTroye.KoodoReader
Install scopeCurrent user

Install Koodo Reader from the command line

Install with Windows Package Manager
winget install --id=AppByTroye.KoodoReader -e
Update to the latest version
winget upgrade --id=AppByTroye.KoodoReader -e
Uninstall
winget uninstall --id=AppByTroye.KoodoReader -e
Silent install with the offline installer
"Koodo-Reader-2.4.6-x64.exe" /S

ebookebook-readerepubpdfreader

File types supported by Koodo Reader

Koodo Reader can open or be associated with 10 file types:

.azw.azw3.cb7.cbr.cbt.cbz.epub.fb2.mobi.pdf

Koodo Reader version history

2.4.5 Sep 26, 2026

New Features

  • Support for exporting notes, highlights, and new vocabulary in JSON format
  • Support for re-importing notes, highlights, and new vocabulary in JSON and CSV formats; go to Settings > Data
  • Optimized rendering speed when handling large numbers of notes and highlights; no more lag issues
  • Support for using AI to extract book titles and author names from filenames; right-click on a book and select “Edit Book”
  • Support for using AI to parse book titles and authors from filenames when importing books; go to Settings > General
  • Supports caching full-text translation and OCR results; books will load directly from the cache the next time they’re opened
  • Added Paragraph Mode, Reading Ruler, and Speed Reading Mode; enable them in the reading options panel on the right
  • Supports streaming parsing of CBZ and CBT books; no longer requires loading the entire book into memory, significantly improving book import and opening speeds
  • Online book metadata matching now includes publication date, ISBN, ratings, and other information
  • Copying text from books now preserves the original text formatting
  • Added 100 curated book and app background images; go to Settings > Background Images
  • Added 11 public domain dictionaries; go to Settings > Local Dictionaries
  • Added export progress tracking for batch book exports
  • Supports searching for books using a book key
  • Restored support for custom TTS plugins, with added security warnings …
2.4.4 Sep 3, 2026

New Features

  • The bookmarks, notes, and highlights lists in the left panel now support searching and sorting by reading progress
  • Supports automatic import of books from local folders. Click the triangle next to the “Import” button. Each time the app launches, it will automatically scan the specified folder for new books and import them
  • Added the total number of search results to the in-book search feature
  • Added highlight rules to text rules, allowing you to highlight specific text within a book
  • Improved software security: Sandbox environment and context isolation are enabled by default, and the rendering process’s permissions to access and manipulate the local machine have been disabled. Due to this change, custom TTS plugins will no longer be supported
  • Optimized memory usage during book import
  • The Translation, Dictionary, Ask AI, and Notes popups can now be moved to any position or pinned to the right side to function as a sidebar
  • Support for clearing AI chat history
  • Support for configuring HTTP and SOCKS5 proxies; go to Settings > More Settings
  • Scanned PDFs now support more annotation styles, including highlighters, text, shapes, and more
  • Support for copying AI chat responses; tap the “Copy” button at the bottom of the response
  • Optimized the PDF TTS feature to support more natural sentence breaks
  • OPDS now supports downloading books in more formats
  • (Mobile) Optimized performance and frame rate for smooth and simulated page-turning animations …
2.4.3 Aug 1, 2026

New Features
- The context length for custom AI models now retains approximately 5 messages by default to prevent the context from growing indefinitely
- The keyboard shortcut for creating a note has been changed to Ctrl + Enter
- Optimize the trigger area for the buttons around the book
- Browser extension is now listed in the Chrome Web Store and Edge Addons Store
- (Mobile) The context length for custom AI models now retains approximately 5 messages by default to prevent the context from growing indefinitely
- (Mobile) Android version is now listed in the Google Play Store
Fixes
- Fixed an issue where backup files from the 1.7.4 stable release could not be restored
- Fixed an issue where PDF reading progress was lost in the 1.7.4 stable release
- Fixed an issue where the book list was not displayed after upgrading from the 1.7.4 stable release
- Fixed compatibility issues with the Minimax audiobook plugin
- (Mobile) Fixed a UI issue on the TTS voice page
Note
This version has been selected as the stable release candidate. It should work fine in most cases. If you have any concerns, please download the previous stable version
Tip
You can also download the installation package for this version from the our self-hosted mirror.

Frequently asked questions

Is Koodo Reader free?

Yes. Koodo Reader is free and open-source software released under the AGPL-3.0 license.

What is the latest version of Koodo Reader?

The latest version is 2.4.6, released on Oct 7, 2026.

Is it safe to download Koodo Reader?

The download button links to the official installer published on dl.koodoreader.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 706ce81ec8baf0e659bba722a343bce2bdd9be78c6ef5dbb061e9ef604733a0b.

Which Windows versions does Koodo Reader support?

Koodo Reader runs on Windows and is available for 64-bit (x64), ARM64 systems.

How do I install Koodo Reader silently?

Run the offline installer with "Koodo-Reader-2.4.6-x64.exe" /S, or install it with Windows Package Manager: winget install --id=AppByTroye.KoodoReader -e --silent.

How do I uninstall Koodo Reader?

Open Settings › Apps › Installed apps, find Koodo Reader and select Uninstall. From the command line, run winget uninstall --id=AppByTroye.KoodoReader -e.

What file types can Koodo Reader open?

Koodo Reader supports 10 file types, including .azw, .azw3, .cb7, .cbr, .cbt, .cbz, .epub, .fb2 and more.