How to convert EPUB to FB2
- Add your .EPUB file - drop it in the box above or click to browse.
- Convert it to .FB2 in a few seconds.
- Download your new .FB2 file.
What to expect
- Multi-column layouts, sidebars, drop caps, and fixed-layout sections are stripped - FB2 has no equivalent structures, so complex EPUB formatting becomes plain flowing text.
- Embedded fonts are dropped; the FB2 reader app applies its own fonts, which may affect display of non-Latin scripts.
- DRM-protected EPUBs (purchased from stores using Adobe or Kobo DRM) cannot be converted - only DRM-free files work.
Frequently asked questions
Does EPUB 3 convert correctly to FB2?
Yes - Calibre reads both EPUB 2 and EPUB 3. Features with no FB2 equivalent (audio, video, MathML) are stripped, but all text content and basic structure are preserved.
Why does the FB2 look different from the original EPUB?
FB2 intentionally separates content from presentation, leaving fonts, spacing, and margins to the reader app. Visual differences are normal; the text itself should be identical.
Are images kept after conversion?
Yes - images are embedded inside the
.fb2 file as base64 data, so image-heavy books may produce a slightly larger file than the source EPUB.Can I convert FB2 back to EPUB?
Yes - Calibre converts in both directions; run
ebook-convert book.fb2 book.epub to reverse the process.Programs that convert EPUB: Hamster Free eBook Converter · Calibre · Calibre for Mac · Calibre for Linux
