Free Online FB2 to EPUB Converter

Convert FB2 to EPUB online for free.

Drop FB2 files here

or click anywhere in this box to choose files

Max file size 10MB. Sign up for more.

Selected Files

File Name	Size	Convert To

Convert all to:

Conversion Complete

File Name	File Size	Download

Convert More Files Buy Me a Coffee Download All (ZIP)

About the output format

When EPUB is the right output

EPUB is the open ebook standard — reflows text, supports tables of contents and metadata, works on every e-reader except Kindle (which uses MOBI/AZW3 natively but converts EPUB on upload). Convert to EPUB when publishing to Apple Books, Kobo, Google Play Books, or shipping direct-to-reader PDFs / DOCX manuscripts.

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

About the FB2 Format

FB2 (FictionBook 2.0) is an XML-based ebook format created in Russia that has become the dominant standard for digital books in Russia, Ukraine, and across Eastern Europe. Unlike formats that store visual presentation, FB2 uses semantic markup to describe the logical structure of a book — title pages, chapters, sections, epigraphs, poems, and citations are all encoded as distinct XML elements, making it exceptionally well-suited for fiction and literary works.

FB2 stores rich metadata including author biography, genre classification, series information, and cover images directly within the XML structure, making library management and cataloging straightforward. The format handles Cyrillic and Unicode text natively, ensuring proper rendering of Russian, Ukrainian, Bulgarian, and other scripts. FB2 is supported by popular reading apps like FBReader, CoolReader, and Moon+ Reader, particularly on Android. While less common outside Eastern Europe, FB2 files can be converted to EPUB, PDF, or MOBI for use on international eReaders and Kindle devices.

FB2 to EPUB FAQ

Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert FB2 files to EPUB.

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

Yes. Upload your FB2 ebook and iFormat converts it 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 iFormat converts them all 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.

Is there a file size limit for FB2 to EPUB conversion?

The free plan supports files up to 50 MB, which covers the large majority of FB2 files. For longer or higher-resolution files, Starter raises the limit to 100 MB, Plus to 1 GB, and Pro to 5 GB.

Document Conversion Guides for Free Online FB2 to EPUB Converter

Read guides about PDF, Word, and editable document workflows connected to Free Online FB2 to EPUB Converter.

How to Convert Kindle Books to EPUB — DRM-Free Guide

Convert Kindle books to EPUB for reading on Kobo, Apple Books, or any e-reader. Covers DRM-free books, format differences, and conversion tools.

Ebook Formats Explained — EPUB, MOBI, PDF, AZW3, KFX & More

A complete guide to ebook formats. Compare EPUB, MOBI, AZW3, PDF, and KFX by reader support, features, and when to use each.

How to Open EPUB Files Without a Kindle — Free Readers for Every Device

Got an EPUB file and not sure how to open it? Here are the best free EPUB readers for Windows, Mac, iPhone, iPad, Android — and how to read EPUBs on a Kindle.

EPUB vs PDF vs MOBI — Which Ebook Format Is Best for Reading?

EPUB, PDF, and MOBI each handle ebooks differently. This guide compares reflowable text, device compatibility, DRM, and reading experience to help you pick the right format.