Free Online EPUB to FB2 Converter
Convert EPUB to FB2 online for free.
Drop EPUB files here
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Up to 50 MB per file. Sign up free to convert files up to 100 MB.
Selected files
| File name | Size | Convert to |
|---|
Preparing files
Checking files and selected output formats.
EPUB vs FB2: Side-by-side
Technical comparison of the two formats, useful for deciding which to use, or for confirming what changes during conversion.
| Property | EPUB | FB2 |
|---|---|---|
| Full name | Electronic Publication | FictionBook 2 |
| Year introduced | 2007 | 2004 |
| Developer / standard body | W3C (formerly IDPF) | FictionBook (open) |
| MIME type | application/epub+zip | application/x-fictionbook+xml |
| File extension | .epub | .fb2 |
| Compression | ZIP-compressed XHTML + CSS | XML (typically uncompressed) |
| Color / data depth | N/A | N/A |
| Max dimensions / size | Software-limited | Software-limited |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | W3C EPUB 3.3 / ISO/IEC 23736 | FictionBook (open) |
| Best for | Apple Books, Kobo, Nook, Google Play Books, reflowable text | Russian-speaking ebook community, lightweight ebook archiving |
Frequently asked questions
Can I convert EPUB books to FB2 for my Kindle or Kobo?
Yes. Upload your EPUB ebook and it converts to FB2 with chapter structure, cover art, and formatting preserved. Load the FB2 onto your Kindle, Kobo, Nook, or any eReader that supports the format.
How to convert EPUB to FB2 without losing the table of contents
Chapter navigation, the cover image, and text formatting all carry over during conversion. The FB2 has proper chapter links so you can jump between sections on your eReader just like the original EPUB.
Can I convert multiple EPUB ebooks to FB2 at once?
Yes. Upload a batch of EPUB files and they are all converted to FB2. 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 FB2?
Yes. FB2 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 FB2 for?
FB2 is the FictionBook ebook format best for FictionBook readers. Convert your EPUB to FB2 when your eReader or app opens FB2 more reliably, so the whole library works on one device.
What is EPUB?
EPUB is a reflowable ebook format, typically used for Kobo, Apple Books, and Nook. Converting it to FB2 produces a file that opens on systems without EPUB support.