Free Online FB2 to EPUB Converter

Convert FB2 to EPUB online for free.

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FB2 to EPUB: structured XML into an open book

FictionBook is a single XML file that describes a book semantically: this is a chapter, this is an epigraph, this is a verse stanza, rather than describing how it should look. That makes the conversion to EPUB unusually clean: the structure maps onto XHTML directly, and images stored base64-encoded inside the XML are extracted into the EPUB as real files.

Convert when your reader does not handle FB2, which is most non-Russian apps and every Kindle. The semantic markup means you lose less here than in most ebook conversions.

FB2 vs EPUB: Side-by-side

Technical comparison of the two formats, useful for deciding which to use, or for confirming what changes during conversion.

Property	FB2	EPUB
Full name	FictionBook 2	Electronic Publication
Year introduced	2004	2007
Developer / standard body	FictionBook (open)	W3C (formerly IDPF)
MIME type	application/x-fictionbook+xml	application/epub+zip
File extension	.fb2	.epub
Compression	XML (typically uncompressed)	ZIP-compressed XHTML + CSS
Color / data depth	N/A	N/A
Max dimensions / size	Software-limited	Software-limited
Transparency	No	No
Animation	No	No
Standard / specification	FictionBook (open)	W3C EPUB 3.3 / ISO/IEC 23736
Best for	Russian-speaking ebook community, lightweight ebook archiving	Apple Books, Kobo, Nook, Google Play Books, reflowable text

Frequently asked questions

Can I convert FB2 books to EPUB for my Kindle or Kobo?

Yes. Upload your FB2 ebook and it converts to EPUB with chapter structure, cover art, and formatting preserved. Load the EPUB onto your Kindle, Kobo, Nook, or any eReader that supports the format.

How to convert FB2 to EPUB without losing the table of contents

Chapter navigation, the cover image, and text formatting all carry over during conversion. The EPUB has proper chapter links so you can jump between sections on your eReader just like the original FB2.

Can I convert multiple FB2 ebooks to EPUB at once?

Yes. Upload a batch of FB2 files and they are all converted to EPUB. Each book downloads separately or as a ZIP, so you can convert an entire library in one session.

Does the text still reflow after converting to EPUB?

Yes. EPUB keeps text reflowable, so it adapts to any screen size and font setting on your eReader rather than being locked to a fixed page like a PDF.

Which reader is EPUB for?

EPUB is a reflowable ebook format best for Kobo, Apple Books, and Nook. Convert your FB2 to EPUB when your eReader or app opens EPUB more reliably, so the whole library works on one device.

What is FB2?

FB2 is the FictionBook ebook format, typically used for FictionBook readers. Converting it to EPUB produces a file that opens on systems without FB2 support.