Convert Documents to FB2 Online — Free eBook Converter
Use this free online converter to turn documents and eBooks from popular formats into FB2 (FictionBook2) format — ready to read on Hanlin, PocketBook, and other compatible eReaders, with no software installation needed.
What is FB2?
FB2, short for FictionBook 2, is an open XML-based eBook format developed in Russia and widely used across Eastern Europe. Unlike PDF or EPUB, FB2 stores all book content — text, metadata, cover images, and annotations — inside a single well-structured XML file. This design makes FB2 files easy to parse, search, and convert, and allows readers to reflow text smoothly at any font size or screen width.
FB2 is natively supported by a large range of reading applications and dedicated eReader devices, including PocketBook hardware, the FBReader app (available on Android, Linux, and Windows), and CoolReader. The format also compresses efficiently into .fb2.zip archives without any loss of content.
Why convert to FB2?
There are several practical reasons to convert your document or eBook into FB2 format:
- Device compatibility: Many Russian and Eastern European eReader devices and apps treat FB2 as their primary format, offering the best rendering quality for it.
- Reflowable text: FB2 adapts to any screen size, making it more comfortable to read on smartphones and small eReaders than fixed-layout formats like PDF.
- Rich metadata support: FB2 stores author name, title, genre, annotation, and cover art inside the file itself, keeping your library well-organised.
- Open and future-proof: As a plain XML format, FB2 files remain readable without proprietary software and are easy to process with standard tools.
Supported input formats
The converter accepts a wide range of document and eBook source formats, including EPUB, MOBI, AZW3, LIT, LRF, PDB, HTML, RTF, DOCX, ODT, TXT, and more. Simply upload your file, choose FB2 as the output, and download the converted eBook.
Frequently asked questions
Is this FB2 converter free to use?
Yes, the converter is completely free. No subscription, account, or payment is required to convert files to FB2 format.
What happens to my uploaded file after conversion?
Uploaded files are processed on the server solely to perform the conversion and are deleted automatically afterwards. They are not stored, shared, or used for any other purpose.
Which input formats can I convert to FB2?
The tool supports a broad set of source formats including EPUB, MOBI, AZW3, LIT, LRF, PDF, DOCX, ODT, RTF, HTML, and TXT, among others.
Will images and formatting be preserved in the FB2 output?
The converter retains inline images and basic text formatting such as headings and paragraphs. Complex layouts from formats like PDF may be simplified, as FB2 is a reflowable format.
Can I receive an email notification when my conversion is done?
Yes. If you are logged in to your Conversion-Tool.com account, you can opt in to receive an email notification as soon as your converted FB2 file is ready to download.