EPUB to FB2 Converter

Summary

EPUB to FB2 Converter reads your EPUB ebook entirely inside your browser using JSZip to unpack the container and extract chapter HTML, then builds a well-formed FictionBook 2 XML document. Because all processing is local, your ebooks never leave your device — making it safe for personal, purchased, or confidential ebooks. The output preserves chapter structure, title, and author metadata in the FB2 format used by popular e-readers like FBReader and PocketBook.

How it works

1. Click the upload area or drag an EPUB file onto it.
2. JSZip unpacks the EPUB container and reads the OPF spine to find chapters in their correct reading order.
3. Each chapter's HTML is converted to FB2 paragraph elements.
4. Metadata such as title and author are written into the FB2 description block.
5. Click "Convert to FB2", then "Download FB2" to save the finished FictionBook file.

Use cases

• Converting EPUB ebooks to FB2 for reading on PocketBook or FBReader devices.
• Preparing ebooks for e-reader apps that support FB2 but not EPUB.
• Archiving EPUB content in the open FictionBook 2 XML format.
• Converting downloaded EPUB books for Russian-market e-readers that favor FB2.
• Batch-preparing personal ebook libraries for FB2-native reading software.
• Checking EPUB chapter structure by viewing the converted FB2 output.

Frequently Asked Questions