calibre AlternativesOnly apps categorised as PDF Readers

The best PDF Reader alternative to calibre is Librera Reader, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to calibre and many of them are PDF Readers so hopefully you can find a suitable replacement. Other interesting PDF Reader alternatives to calibre are KOReader, Foliate, ReadEra and Koodo Reader.

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calibre alternatives are mainly PDF Readers, but if you're looking for Ebook Readers or Ebook Libraries you can filter on that. These are just examples - use the filter bar below to find more specific alternatives to calibre.
calibre iconcalibre
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Free e-book manager offering library management, multi-format conversion, syncing to devices, news download as e-books, built-in viewer, editor, and privacy.

More about calibre
More about calibre
calibre alternatives page was last updated Mar 15, 2025
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  1. Librera Reader icon

    Librera Reader

     71 likes
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    Librera Reader is a highly customizable and feature-rich application for reading books in PDF, EPUB, MOBI, DjVu, FB2, TXT, RTF, AZW, AZW3, HTML, CBZ, CBR formats on Android devices.

    58 Librera Reader alternatives

    License model

    • Freemium • Open Source

    Application types

    Country of Origin

    • SK flagSlovakia
    • European Union flagEU

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    Librera Reader screenshot 1

    Properties

    1.  Customizable
    2.  Lightweight
    3.  Privacy focused
    4.  Support for Themes

    Features

    1.  Ad-free
    2.  No Tracking
    3.  Text to Speech
    4.  Dark Mode
    5.  Works Offline
    6.  Auto Scrolling
    7.  Built-in File Manager
    8.  OPDS Client
    9.  Full-Text Search
    10.  No registration required
    11.  Ebook Conversion
    12.  Blue light filter

    Librera Reader VS calibre

     

    • Most users think Librera Reader is a great calibre alternative.

    • Librera Reader is the most popular Android & Android Tablet alternative to calibre.

    • Librera Reader is the most popular Open Source & free alternative to calibre.

    • Librera Reader is Freemium and Open Sourcecalibre is Free and Open Source
    • Librera Reader is Customizable, Lightweight and Privacy focusedcalibre is not according to our users
  2. KOReader icon

    KOReader

     60 likes
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    An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Kindle, Kobo, PocketBook, Linux and Android devices.

    52 KOReader alternatives

    License model

    • Free • Open Source

    Application types

    Platforms

    • Linux
    • Android
    • AppImageHub
    • Kobo Books
    • Flathub
    • F-Droid
    • Kindle Fire
    • Android Tablet
    KOReader screenshot 1
    KOReader screenshot 2
    KOReader screenshot 3

    Properties

    1.  Lightweight

    Features

    1.  Built-in Dictionary
    2.  Ad-free
    3.  Dark Mode
    4. wallabag icon  Wallabag integration
    5. Wikipedia icon  Wikipedia integration
    6.  No Tracking
    7.  OCR
    8.  Portable
    9.  Full-Text Search
    10.  No registration required
    11.  Works Offline
    12.  PDF annotation

    KOReader VS calibre

     
    Comments about KOReader as an Alternative to calibre
    N.A. Ferrell
    Positive Aug 5, 2023
    0

    A very feature-full reading app. I use it with my PocketBook Color and PocketBook InkPad Color and it is much snappier than the default reading app.

    Biep
    Positive Mar 15, 2025
    0

    As an e-book reader it is unparalleled, I believe. It is not a feature-rich library management tool, though.

    calibre Icon
    KOReader icon

    • Most users think KOReader is a great calibre alternative.

    • KOReader is the most popular Linux alternative to calibre.

    • KOReader is Free and Open Sourcecalibre is also Free and Open Source
    • KOReader is Lightweightcalibre is not according to our users
  4. Foliate icon

    Foliate

     52 likes
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    A simple and modern eBook viewer for Linux desktops.

    51 Foliate alternatives

    License model

    • Free • Open Source

    Application types

    Country of Origin

    • IT flagItaly
    • European Union flagEU

    Platforms

    • Linux
    • BSD
    • Snapcraft
    • Flathub
    Foliate screenshot 1

    Properties

    1.  Privacy focused
    2.  Support for Themes

    Features

    1.  Dark Mode
    2.  Built-in Dictionary
    3.  Text Highlighting
    4.  Export annotations
    5.  Text annotation
    6.  Works Offline
    7.  Full-Text Search
    8.  Ad-free
    9.  Text to Speech
    10.  No registration required
    11.  Flipping pages
    12.  Plain text flows

    Foliate VS calibre

     
  5. Ad
    Screenshot
    Icecream Ebook Reader icon
    Icecream Ebook Reader

    Icecream Ebook Reader is a software that turns your computer screen into an EPUB reader, supporting various ebook formats such as EPUB, MOBI, FB2, PDF, and more. It enables users to manage a digital library and offers features li...

    https://icecreamapps.com
    Learn More
  6. ReadEra icon

    ReadEra

     53 likes
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    Read book files in EPUB, PDF, DOC, DOCX, RTF, TXT, DJVU, FB2, MOBI and CHM formats. Supports chapters, bookmarks, page style. Saves the current reading position. Automatic detection and display of the list of all supported documents on your device.

    71 ReadEra alternatives

    License model

    • Freemium • Proprietary

    Application types

    Country of Origin

    • US flagUnited States

    Platforms

    • Android
    ReadEra screenshot 1

    Properties

    1.  Educational

    Features

    1.  Dark Mode
    2.  Auto fetch album covers
    3.  Fullscreen support
    4.  Works Offline
    5.  Ad-free
    6.  No registration required
    7.  Text to Speech
    8.  Material design

    ReadEra VS calibre

     
  7. Koodo Reader icon

    Koodo Reader

     40 likes
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    Koodo Reader is an all-in-one e-book reader that can help you better manage and study your e-books. It's free and open-source.

    27 Koodo Reader alternatives

    License model

    • Free • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Flathub
    Koodo Reader screenshot 1

    Properties

    1.  Privacy focused
    2.  Customizable

    Features

    1.  Dark Mode
    2.  Works Offline
    3.  Ad-free
    4.  PDF annotation
    5.  No registration required
    6.  Full-Text Search
    7.  Cloud Sync
    8.  Text to Speech
    9.  Web-Based

    Koodo Reader VS calibre

     
    Comments about Koodo Reader as an Alternative to calibre
    alexanderprange
    Positive Sep 10, 2022
    1

    cleaner and significantly better user interface and user friendly.

    RemovedUser
    Positive Dec 23, 2021
    0

    I use the web-based platform and it's just very good. Super intuitive and minimalistic but with great functionalities and customization. And it's FOSS.

    calibre Icon
    Koodo Reader icon

    • Most users think Koodo Reader is a great calibre alternative.

    • Koodo Reader is the most popular Windows & Mac alternative to calibre.

    • Koodo Reader is Free and Open Sourcecalibre is also Free and Open Source
    • Koodo Reader is Customizable and Privacy focusedcalibre is not according to our users
  8. Openlib icon

    Openlib

     22 likes
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    Openlib is an open source app to download and read books from shadow library (Anna’s Archive). The App Has Built In Reader to Read Books.

    62 Openlib alternatives

    License model

    • Free • Open Source

    Application types

    Platforms

    • Android
    • F-Droid
    Openlib screenshot 1
    Openlib screenshot 2
    Openlib screenshot 3

    Properties

    1.  Support for Themes
    2.  Privacy focused

    Features

    1.  No registration required
    2.  Dark Mode
    3.  Ad-free
    4.  No Tracking

    Openlib VS calibre

     
  10. Kavita icon

    Kavita

     23 likes
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    Lighting fast with a slick design, Kavita is a rocket fueled self-hosted digital library which supports a vast array of file formats. Install to start reading and share your server with your friends. book reader, self hosted, manga, comics, free, manhwa, e readers, electronic...

    172 Kavita alternatives

    License model

    • Freemium • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Self-Hosted
    Kavita screenshot 1

    Properties

    1.  Lightweight
    2.  Privacy focused

    Features

    1.  Web-Based
    2.  Dark Mode
    3.  Offline Reading
    4.  Ad-free
    5.  No Tracking
    6.  File Hosting
    7.  Works Offline
    8.  Built-in viewer
    9.  No registration required

    Kavita VS calibre

     

    • Kavita is the most popular Self-Hosted alternative to calibre.

    • Kavita is Freemium and Open Sourcecalibre is Free and Open Source
    • Kavita is Lightweight and Privacy focusedcalibre is not according to our users
  11. Calibre-Web icon

    Calibre-Web

     26 likes
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    Calibre-Web is a web app providing a clean interface for browsing, reading and downloading eBooks using an existing calibre database.

    77 Calibre-Web alternatives

    License model

    • Free • Open Source

    Application types

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Self-Hosted
    Calibre-Web screenshot 1

    Calibre-Web Features

    1.  OPDS Server
    2.  Built-in e-Book converter

    Calibre-Web VS calibre

     
  12. uRead icon

    uRead

     9 likes
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    Discover uRead, your ultimate companion for reading and listening! Whether you’re a casual reader or a book enthusiast, uRead transforms your experience with advanced features and a user-friendly design.

    License model

    • Freemium • Open Source

    Application types

    Platforms

    • Android
    • Android Tablet
    uRead screenshot 1

    Properties

    1.  Customizable

    Features

    1.  No registration required
    2.  Works Offline
    3.  Text to Speech
    4.  PDF annotation
    5.  Ratings
    6.  Progress tracking
    7.  Audio Books
    8.  Text Highlighting

    uRead VS calibre

     
9 of 25 calibre alternatives