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EPUB to FB2 converter, without the upload.

Turn EPUB e-books into FB2. It is converted in your browser, so the file never leaves your device.

Drop EPUB files here

or choose from your computer paste with Ctrl V

Ready · other file types work too0 bytes uploaded, ever

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How to convert EPUB to FB2

  1. Add your EPUB e-books

    Drop EPUB files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.

  2. FB2 is already chosen

    Press Convert. There is nothing else to set. The work happens in this tab.

  3. Download

    Save the FB2, or download everything as one ZIP if you converted several files.

Why ToAny

  • Private by construction

    The EPUB to FB2 converter is part of this page and runs inside your browser. Your e-books are never sent to ToAny or to anyone else.

  • No upload, no queue

    Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.

  • Free, without an account

    No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.

EPUB to FB2: what to expect

EPUB needs an e-reader app and does not print with a fixed layout. FB2 is a clean, open e-book format that many readers support. EPUB is at home in e-books that adapt to any screen size; FB2 is the usual choice for e-books, especially from Russian-language libraries.

Chapters are joined in the book's reading order and its pictures are embedded; an e-book with copy protection (DRM) is refused because its text cannot be read. Headings become sections; a heading that arrives after a section's text has begun becomes a subtitle instead, because FictionBook does not allow a section to mix text and subsections.

EPUB vs FB2

EPUB

EPUB e-book

EPUB is the open standard for e-books. Text reflows to fit the screen and the reader chooses the font and size. Almost every e-reader other than older Kindles opens it directly.

Opens in Apple Books, Kobo, Google Play Books, Calibre and, since 2022, Send to Kindle

EPUB converter
FB2

FictionBook e-book

FB2 is an XML e-book format that separates a book's structure from its looks: sections, poems, epigraphs and notes are marked up, and the reader decides the layout. Images sit inside the file as base64 text. It is very common in Russian-language libraries.

Opens in FBReader, Calibre, PocketBook and most e-reader apps; not Kindle

FB2 converter
EPUB compared with FB2
EPUBEPUB e-bookFB2FictionBook e-book
Stands forElectronic PublicationFictionBook 2
TypeReflowable e-bookE-book
CompressionZIP container of XHTMLNone (plain XML; often zipped as .fb2.zip)
Introduced2007, by the International Digital Publishing Forum (now W3C)2004, by Dmitry Gribov
Opens inApple Books, Kobo, Google Play Books, Calibre and, since 2022, Send to KindleFBReader, Calibre, PocketBook and most e-reader apps; not Kindle
Best forE-books that adapt to any screen sizeE-books, especially from Russian-language libraries
File extension.epub.fb2

Questions

Are my e-books uploaded anywhere?

No. The EPUB to FB2 conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.

Is anything lost when converting EPUB to FB2?

Text is kept. Formatting carries over only as far as FB2 supports it.

Can I convert several EPUB files at once?

Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.

How do I convert EPUB to FB2 on Windows, Mac, iPhone or Android?

The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the EPUB file, press Convert and save the FB2. There is nothing to install.

Is there a file size limit?

Yes. Files up to 150 MB are accepted; a larger one is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.