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Best File Reader Software in 2026

  1. 1

    ImageGlass

    Free plan Open source APILinuxMac+1

    ImageGlass covers image browsing, metadata viewing, and basic edits, with a free Classic edition and paid Pro options. Check the listed platform requirements and Pro features against your needs.

    9.1 Free plan · paid from $14.90 · 14-day trial Visit site
  2. 2

    Librera Reader

    Free plan Open source AndroidExtensioniPhone+2

    Librera Reader is suited to readers handling varied file formats, with annotation, sync, and speech features alongside its core reader.

    8.9 Free plan Visit site
  3. 3

    FBReader

    Free plan AndroidiPhoneLinux+2

    FBReader supports a broad set of ebook formats and offers synchronization across supported devices.

    7.6 Free plan Visit site
  4. 4

    Foxit PDF Reader

    Free plan AndroidiPhoneMac+2

    Foxit PDF Reader covers core PDF tasks, including forms, signatures, and collaboration, with offline desktop access. Consider the listed macOS range and lack of OCR if those matter to your workflow.

    7.6 Free plan Visit site
  5. 5

    Apple Books Digital Narration

    Free plan Web

    Choose Apple Books Digital Narration if you own the audiobook rights to an eligible English ebook and want free production for Apple Books distribution. Look elsewhere if you need preorder support.

    7.3 Free plan Visit site
  6. 6

    FastStone Image Viewer

    by FastStone Image Viewer
    Free plan Windows

    FastStone Image Viewer brings image editing, collection handling, scanning, and slideshow tools into a Windows application.

    7.2 Free plan · paid from $34.95 Visit site
  7. 7

    Kobo Books

    Free plan AndroidiPhoneWeb

    Kobo Books provides mobile audiobook playback, offline listening, and two Kobo Plus options with a 14-day trial.

    7.2 Free plan · 14-day trial Visit site
  8. 8

    Mozilla PDF.js

    Free plan APIExtensionLinux+2

    PDF.js offers a free, open-source foundation for PDF rendering, with both an API and an adaptable viewer.

    7.2 Free plan Visit site
  9. 9

    MuPDF

    Free plan AndroidiPhoneLinux+4

    MuPDF covers many document operations and offers developer bindings for several environments. Its licensing terms are a key consideration, particularly for server-based use or embedding in a product.

    7.2 Free plan · paid from $299/mo · 14-day trial Visit site
  10. 10

    Google Play Books Auto-narrated Audiobooks

    Free plan Web

    The service provides narration and editing controls for publishers with eligible ebooks and rights. Its distribution and pricing rules for sales elsewhere are important constraints to check.

    7.1 Visit site
  11. 11

    Kindle Create

    Free plan MacWindows

    Kindle Create prepares completed manuscripts for KDP in reflowable, print replica, or comic formats.

    7.1 Free plan Visit site
  12. 12

    IrfanView

    by IrfanView
    Free plan Windows

    IrfanView combines image viewing with a broad set of editing and file-processing tools for Windows. Private users can use it free, but commercial users must obtain a license.

    7.0 Free plan · paid from $18 Visit site
  13. 13

    Okular

    Free plan LinuxMacWindows

    Choose Okular for a free, open-source viewer with broad document-format support, annotation tools and PDF signature features. Look elsewhere if OCR is required, since Okular does not support it.

    7.0 Free plan Visit site
  14. 14

    qView

    Free plan LinuxMacWindows

    qView focuses on image viewing with a minimal interface and includes browsing controls, format support, and configurable preferences.

    7.0 Free plan Visit site
  15. 15

    ReadEra

    Free plan AndroidiPhoneMac

    ReadEra covers a wide range of formats with library organization, annotations, and flexible reading controls.

    6.9 Free plan Visit site
  16. 16

    Moon+ Reader

    Free plan Android

    Moon+ Reader combines extensive format support with customizable controls, annotations, lookup features, and synchronization.

    6.8 Free plan Visit site
  17. 17

    SumatraPDF

    Free plan Windows

    SumatraPDF covers a wide range of reading formats and PDF tasks at no cost. Its Windows-only availability and the stated crash-report behavior are worth considering before choosing it.

    6.6 Free plan Visit site
  18. 18

    Universal Viewer

    Free plan Windows

    Choose Universal Viewer if you want a Windows desktop viewer for many file types, especially if large text files or extensive image and media format support matter.

    6.5 Free plan · paid from $26 · 15-day trial Visit site
  19. 19

    Papers

    Free plan Linux
    6.2 Free plan Visit site
  20. 20

    KOReader

    Free plan AndroidLinuxMac
    6.1 Free plan Visit site
  21. 21

    Thorium Reader

    Free plan iPhoneLinuxMac+1
    5.9 Free plan Visit site
  22. 22

    XnView MP

    Free plan LinuxMacWindows
    5.7 Free plan · paid from €29 Visit site
  23. 23

    XnView Classic

    Free plan Windows
    5.4 Free plan Visit site
  24. 24

    File Viewer Plus

    Paid Windows
    4.5 14-day trial Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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