FB2 (FictionBook) is an XML-based e-book format. Opened by calibre and many readers. FictionBook is an open XML e-book format that became especially popular in Russia. FictionBook was created by Dmitry Gribov and Mikhail Matsnev as an open, royalty-free alternative to proprietary e-book formats. FB2 emphasises semantic structure over styling, tagging authors, chapters, poems and epigraphs rather than fixing their appearance.

How do I open a .FB2 file?

Drop a .FB2 file onto Analyser at https://analyser.valjdakosta.com/ and it opens directly in your browser - no upload, no account and no software to install. Open lightweight document and markup formats as selectable page previews: Rich Text Format (RTF, control words stripped to readable prose), AbiWord (ABW), FictionBook e-books (FB2), Hangul HWPX, and MHTML web archives (the saved HTML rendered with scripts removed), plus markup and typesetting source - DITA, TEI, JATS journal XML, reStructuredText, AsciiDoc, Org-mode, Textile, TeX/LaTeX and BibTeX - shown with every page selectable and copyable. Also opens the small sidecar files unpacked from 3MF and OOXML bundles: OPC relationship XML (.rels) and MD5 checksum text (.md5).

Can I open a .FB2 file online for free?

Yes. Analyser is a free online .FB2 opener and viewer that runs entirely in your browser - your .FB2 file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.FB2 file - what it is and how to open it online

Analyse a .FB2 file

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What is a .FB2 file?

FB2 (FictionBook) is an XML-based e-book format. Opened by calibre and many readers.

Did you know: FictionBook is an open XML e-book format that became especially popular in Russia.
FictionBook was created by Dmitry Gribov and Mikhail Matsnev as an open, royalty-free alternative to proprietary e-book formats.
FB2 emphasises semantic structure over styling, tagging authors, chapters, poems and epigraphs rather than fixing their appearance.
What Analyser shows you: Open lightweight document and markup formats as selectable page previews: Rich Text Format (RTF, control words stripped to readable prose), AbiWord (ABW), FictionBook e-books (FB2), Hangul HWPX, and MHTML web archives (the saved HTML rendered with scripts removed), plus markup and typesetting source - DITA, TEI, JATS journal XML, reStructuredText, AsciiDoc, Org-mode, Textile, TeX/LaTeX and BibTeX - shown with every page selectable and copyable. Also opens the small sidecar files unpacked from 3MF and OOXML bundles: OPC relationship XML (.rels) and MD5 checksum text (.md5).
Open a .FB2 file: Drag a .FB2 file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
Related formats: .RTF · .ABW · .HWPX · .MHT · .MHTML · .DITA · .DITAMAP · .TEI · .JATS · .NXML · .RST · .ADOC · .AsciiDoc · .ORG · .Textile · .TeX · .LaTeX · .BIB and more. See all supported file types.