Convert FB2 files online for free
The converter easily converts your FB2 file to various formats - free and online. No Kindle or extra software needed.
The converter also works in reverse, so you can convert other E-Book formats to FB2 with high quality output.
The .FB2 file is a FictionBook 2.0 document, an open XML-based eBook format originally popularized in Russia. Unlike binary formats, .FB2 files use simple XML tags to describe the structure of a book - identifying headers, paragraphs, and verses - rather than its visual appearance. While this makes the files lightweight and easy to parse, it presents significant compatibility challenges for modern readers. Most notably, .FB2 is not supported natively by Amazon Kindle devices, nor by standard iOS/Android reader apps like Apple Books. Additionally, because the format prioritizes structure over styling, complex formatting often fails to render correctly compared to modern EPUB files.
To overcome these limitations, conversion is usually necessary. For broad compatibility with Kobo, Google Play Books, and Apple Books, users should convert .FB2 to EPUB. For reading on a Kindle, converting to MOBI or AZW3 is required. If you need to lock in the layout for printing or archiving on a desktop, converting to PDF is the best option. convert.guru allows you to transform these XML structures into your required format instantly, handling the metadata and encoding seamlessly.
Use Convert.Guru to open and convert your FB2 file.
Users also converted ZLIB, BIN, PB2, EPUB, DB2, KFX, RS, EF2, FC2, FB, FBW, FBS and FP2 files.
If you want to convert FB2 file to AZW, KFX, PRC, OPF or CBZ, you can use Calibre or similar software from the "Electronic Book Publishing" category. In the File menu, look for Save As… or Export….
To convert CBT, CBA or DOC files to FB2, try Calibre or another comparable tool in the "Electronic Book Publishing" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our FB2 converter.