FBReader

fbreader.org ↗

Cross-platform ebook reading with format-specific support

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SI Score: 75/100
Pricing: Not confirmed
Free plan: Not confirmed
Sign-up required: Not confirmed

ebook-readers desktop-reading mobile-reading

Ask SI about FBReader

Answers use saved listing facts and recorded sources.

What it does

FBReader is an ebook reader available on several desktop and mobile systems. It supports EPUB and other formats, including Readium LCP-protected EPUB.

Choose the current package for your operating system. FBReader warns that older Linux-distribution packages may be outdated and explicitly says its current application is not open source. Readium LCP support is a specific DRM capability, not permission to open every protected ebook sold by every store.

Chromebook support uses the Android app rather than a dedicated Chrome OS build. On Mac, the App Store edition omits ebook-purchase features found in the direct-download variant.

Strengths

Several desktop and mobile editions
Readium LCP EPUB support

Watch out for

Current application code is not open source

Best for

Reading compatible ebooks across different systems

Sources

Favourite Book Reader – FBReader (Oct 26, 2026)

SI Score

75/100

#62 in Books & Reading

Based on published information. No hands-on task test.

Method 2.0 · Published source review Assessed Oct 26, 2026Score ceiling for this evidence: 84/100.

Product usefulness 75

Evidence

The official page documents host/build and format choices, including a specific LCP DRM capability and closed-source status. These controls support compatibility selection without generalizing to every protected ebook.

Limits: AI review of saved source passages. No hands-on test, human approval or automatic-provider checker receipt.

Source links and check dates are in Sources and checks below.

Separate website checks

These checks do not add points to the SI Score. They inspect the website's HTML, not the product in use.

Basic website checksunknown

No check recorded.

HTML accessibility checksunknown

No check recorded.

Homepage HTML responseunknown

No check recorded.

Trackers in homepage HTMLunknown

No check recorded.

Page date hintsunknown

No check recorded.

Policy links do not verify a company's conduct. An HTML response time is not application speed. Tracker and accessibility checks miss behavior after page load. Copyright dates do not prove product upkeep.

How the SI Score works →

Site facts

Pricing: Not checked yet.
Free plan: Not checked yet.
Sign-up required: Not checked yet.
Platforms: Windows, Mac, Linux, Android, iOS AI reading, not confirmed
API: Not checked yet.
Open source: No AI reading, not confirmed
HTTPS connection: Yes
Last checked: Oct 27, 2026 · online
Listed since: Oct 27, 2026

Unconfirmed details may be unassessed, absent from the pages checked or temporarily unreadable. A missing price does not mean the service is free.

Sources and checks

Supporting pages for product usefulness, site facts, prices and separate website checks. Each record keeps its own date. Reading a page does not establish how well the product performs in use.

fbreader.org/
- PlatformsAI reading, not confirmedChecked Oct 26, 2026
  The official page explicitly lists these editions.
- Open sourceAI reading, not confirmedChecked Oct 26, 2026
  The official page explicitly says FBReader has not been open source since 2015.
- Product usefulness evidenceChecked Oct 26, 2026

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