The Best Open Source SumatraPDF AlternativesTop PDF & Ebook Readers like SumatraPDF

The best open source alternative to SumatraPDF is Okular. If that doesn't suit you, our users have ranked more than 100 alternatives to SumatraPDF and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to SumatraPDF are Evince, MuPDF, Librera Reader and KOReader.

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SumatraPDF alternatives are mainly PDF Readers, but if you're looking for Ebook Readers or PDF Editors you can filter on that. Other popular filters include Android, Linux, Android Tablet, Windows + Open Source, Mac, Windows and Open Source. These are just examples - use the filter bar below to find more specific alternatives to SumatraPDF.
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Alternatives list

  1. Okular icon

    Okular

     486 likes

    Multi-platform document viewer offering extensive format support, including PDF, comics, images, EPUB, and Markdown, with annotation tools, sidebar previews, text-to-speech, DRM management, cross-platform compatibility, and integration with KDE Frameworks libraries.

    117 Okular alternatives

    Cost / License

    Application types

    Platforms

    • Windows
    • Linux
    • BSD
    • KDE Plasma
    • Snapcraft
    • Linux Mobile
    • Flathub
    • Haiku
    Okular screenshot 1
     
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    2
    Okular vs SumatraPDF Comments
    Guest
    Positive
    1

    Because both programs are design to see documents.

    Review by a new / low-activity user.
    veruzian
    Positive
    0

    If you want a basic PDF viewer, this will probably fit the bill. It's simple and ligthweight. I used to use Foxit Reader, and found Okular to be a good FOSS replacement.

    Review by a new / low-activity user.
    • Okular is Free and Open SourceSumatraPDF is also Free and Open Source
  2. Evince icon

    Evince

     460 likes

    Evince (or GNOME Document Viewer) is a document viewer for multiple document formats: PDF, Postscript, djvu, tiff, dvi, XPS, SyncTex support with gedit, comics books (cbr,cbz,cb7 and cbt) and others. See Supported Document Formats for details.

    120 Evince alternatives

    Cost / License

    Application types

    Platforms

    • Linux
    • PortableApps.com
    • Flathub
    • GNOME
    Evince screenshot 1
     
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    4
    Evince vs SumatraPDF Comments
    Guest
    Negative
    3

    not even close to SumatraPDF!

    Review by a new / low-activity user.
    Holy
    Positive
    2

    It has thumbnails. Renders faster. But it's a little bit less stable and no updates for Windows for a long time

    Guest
    Positive
    0

    evince is the best and now!

    Review by a new / low-activity user.
    3 of 4 comments
    • Evince is Free and Open SourceSumatraPDF is also Free and Open Source
    • Evince is MinimalisticSumatraPDF is not according to our users
  4. MuPDF icon

    MuPDF

     160 likes

    MuPDF offers a highly versatile PDF, XPS, and eBook interpreter, customizable as a renderer, viewer, or toolkit. Features include digital signatures, redactions, form filling, annotations, and page manipulation, ideal for mobile, eBooks, and embedded apps supporting Java, C++, and Python.

    94 MuPDF alternatives

    Cost / License

    Application types

    Platforms

    • Windows
    • Linux
    • Android
    • F-Droid
    • Xfce
    MuPDF screenshot 1
     
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    2
    MuPDF vs SumatraPDF Comments
    Guest
    Positive
    3

    This is the core application within SumatraPDF so should be faster but with limited menus

    Review by a new / low-activity user.
    Guest
    Positive
    2

    While the MuPDF library is very lightweight, this reader is more a proof of concept than a lightweight GUI. The MuPDF download is about 70 Mb, Sumatra is less than 10.

    Review by a new / low-activity user.
    • MuPDF is Free and Open SourceSumatraPDF is also Free and Open Source
  5. Librera Reader icon

    Librera Reader

     79 likes

    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.

    69 Librera Reader alternatives

    Cost / License

    • Freemium
    • Open Source

    Application types

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    Librera Reader screenshot 1
     
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    1
    Librera Reader vs SumatraPDF Comments
    Guest
    Negative
    0

    It cant run on Windows as SumatraPDF does so is not a viable alternative

    Review by a new / low-activity user.
    • Librera Reader is Freemium and Open SourceSumatraPDF is Free and Open Source
    • Librera Reader is CustomizableSumatraPDF is not according to our users
  6. KOReader icon

    KOReader

     74 likes

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

    73 KOReader alternatives

    Cost / License

    Application types

    Platforms

    • Linux
    • Android
    • AppImageHub
    • Kobo Books
    • Flathub
    • F-Droid
    • Kindle Fire
    • Android Tablet
    KOReader screenshot 1
     
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    1
    KOReader vs SumatraPDF Comments
    Guest
    Negative
    0

    It cant run on Windows as SumatraPDF does so is not a viable alternative

    Review by a new / low-activity user.
    • KOReader is Free and Open SourceSumatraPDF is also Free and Open Source
  9. Firefox PDF Viewer (PDF.js) icon

    Firefox PDF Viewer (PDF.js)

     165 likes

    PDF Viewer (aka pdf.js) is a new revolutionary extension using web standard technologies that allows you to display within Mozilla Firefox almost all PDF files found on the web without a plugin.

    Cost / License

    Application type

    Platforms

    • Google Chrome
    • Opera
    • Mozilla Firefox
    Firefox PDF Viewer (PDF.js) screenshot 1
     
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    3
    Firefox PDF Viewer (PDF.js) vs SumatraPDF Comments
    Guest
    Negative
    4

    Firefox PDF viewer is a browser extension not a desktop app it is in wrong category

    Review by a new / low-activity user.
    Guest
    Negative
    -1

    This is a PDF reader built into Firefox, not a standalone application.

    Review by a new / low-activity user.
    Guest
    Negative
    0

    It cant run securely outside of the browser as SumatraPDF does so is not a viable alternative

    Review by a new / low-activity user.
    • Firefox PDF Viewer (PDF.js) is Free and Open SourceSumatraPDF is also Free and Open Source
  12. Sioyek icon

    Sioyek

     23 likes

    Sioyek is a PDF viewer with minimal interface optimized for reading research papers and technical books.

    39 Sioyek alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    Main view
     
  13. uRead icon

    uRead

     9 likes

    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.

    Cost / License

    Application types

    Platforms

    • Android
    • Android Tablet
    uRead screenshot 1
     
  14. Cool Reader icon

    Cool Reader

     66 likes

    Cool Reader is fast and small cross-platform XML/CSS based eBook reader for desktops and handheld devices. Understands a number of text document formats, suppurt OPDS (in new ui-opengl version). Fully customizable palette, text reformatting with any font size, font...

    99 Cool Reader alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Alerts

    • Discontinued

    Platforms

    • Windows
    • Linux
    • Android
    • Android Tablet
    • Haiku
    Android version
     
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    2
    Cool Reader vs SumatraPDF Comments
    Guest
    Negative
    1

    Last time I tested it could not read any PDFs as SumatraPDF does so is not a viable alternative

    Review by a new / low-activity user.
    Guest
    Positive
    0

    its good for a lot of formats to read

    Review by a new / low-activity user.
    • Cool Reader is Free and Open SourceSumatraPDF is also Free and Open Source
12 of 48 SumatraPDF alternatives