EPUB to FB2 Converter

Free EPUB to FB2 ebook conversion — online and instant

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EPUB to FictionBook

Seamlessly convert EPUB ebooks to the FB2 format favored by millions of readers across Eastern Europe and Russia.

Fast Processing

Cloud servers handle the conversion in seconds — even longer novels are processed quickly without any load on your device.

Use Any Device

The converter works from any browser on desktops, laptops, tablets, and phones — no dedicated app required.

How to convert EPUB to FB2

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose fb2 or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your fb2 file right afterwards

About formats

EPUB (Electronic Publication) is an open ebook standard originally developed by the International Digital Publishing Forum (IDPF) and now maintained by the W3C following the organizations' merger in 2017. The first version carrying the EPUB name was approved in October 2007 as a successor to the Open eBook Publication Structure (OEBPS). An EPUB file is essentially a ZIP archive containing XHTML or HTML5 content documents, CSS stylesheets, images, fonts, and metadata organized according to the Open Packaging Format and Open Container Format specifications. The current major version, EPUB 3, supports reflowable and fixed-layout content, embedded multimedia, JavaScript interactivity, MathML equations, and rich accessibility features including semantic markup and media overlays for synchronized text and audio. A defining advantage is universal device support — unlike proprietary formats, EPUB works natively on virtually every non-Kindle e-reader, tablet, and reading application, from Apple Books and Google Play Books to Kobo and dozens of third-party apps. The reflowable text model is another core strength, automatically adapting pagination, font size, and margins to match any screen dimension and user preference. EPUB's open specification and active W3C stewardship ensure long-term preservation and vendor independence, making it the de facto standard for digital publishing across libraries, academic institutions, and commercial retailers worldwide.
Initial release: October 2007
FB2 (FictionBook) is an XML-based ebook format created by Dmitry Gribov in 2004, designed to provide a clean semantic description of a book's content independent of its visual presentation. Unlike page-layout formats, FB2 encodes structure — title, authors, chapters, annotations, genres, epigraphs, poems, footnotes, and binary attachments (typically cover images) — within a single well-formed XML document. This structural approach means reading applications have full control over rendering, allowing the same file to adapt perfectly to a small phone screen or a large e-ink reader. FB2 became enormously popular in Russia and Eastern Europe, serving as the dominant format on major Russian digital libraries and ebook distribution platforms. One significant advantage is metadata richness: the format's schema mandates detailed bibliographic information including author, translator, series position, publication date, and genre classification, making library management and discovery straightforward. The plain-text XML foundation is another strength — FB2 files are human-readable, easy to validate, and simple to transform using standard XML tools like XSLT. The format specification is freely available on GitHub, and a wide ecosystem of readers, editors, and converters supports it across all major platforms, from desktop applications like Calibre to dedicated e-readers with native FB2 rendering.
Developer: Dmitry Gribov
Initial release: 2004

Frequently Asked Questions

Why convert EPUB to FB2?

FB2 is the dominant ebook format in Russian-speaking countries. Many readers and library apps in that region work best with FictionBook files.

What apps support FB2?

FBReader, CoolReader, Moon+ Reader, AlReader, and PocketBook devices all open FB2 natively. Calibre handles it on desktop as well.

Does the conversion preserve book metadata?

Yes — author name, title, cover image, and chapter structure are transferred into the resulting FB2 file.

How is FB2 different from EPUB?

FB2 uses a strict XML schema with built-in metadata fields. It is less flexible than EPUB but widely used in Eastern European reading ecosystems.

Is EPUB to FB2 conversion free?

Free on Convertio — no charge for standard conversions. Paid plans extend limits for users who convert large batches regularly.

Can I process multiple files in one go?

Definitely. Upload a stack of EPUB files and batch-convert them all to FB2 without repeating the process for each file.

EPUB to FB2 Quality Rating

4.8 (10,246 votes)
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