EPUB to FB2 Converter
Convert EPUB ebooks to the FictionBook (FB2) XML format popular with many readers.
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About Converting EPUB to FB2
EPUB is the open, reflowable e-book standard used by most readers except Kindle. Text adapts to any screen size, and the format supports images, styling and navigation. When you need to move away from EPUB, the usual reason is simple: not natively read by older kindles.
Converting your EPUB e-book to FB2 solves that. FB2 is an XML-based e-book format popular in Eastern Europe. It stores the whole book in a single structured XML file, which makes it easy to convert. In practice you gain clean xml structure and rich metadata. PrivConvert runs the whole EPUB-to-FB2 conversion in server memory and deletes your file the instant the FB2 is ready — nothing is stored, logged or reused.
When this conversion helps
- You need clean XML structure
- You need rich metadata
- You need easy to convert
- Reworking a fixed EPUB file back into an editable FB2 document
- Sharing a EPUB e-book with someone whose software expects FB2
Tips for best results
- After converting, open the FB2 and skim the formatting — complex layouts occasionally need a small touch-up.
- Files up to 250 MB are supported, and you can batch-convert several EPUB files at once; each is processed privately and deleted immediately.
How to Convert EPUB to FB2 Online
You can convert EPUB to FB2 right in your browser in under a minute. The key change: a fixed EPUB becomes an editable FB2 you can rework.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from EPUB to FB2 starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
What makes this EPUB-to-FB2 converter different
Privacy here is not a checkbox. Every EPUB-to-FB2 conversion is engineered so your data never lingers, leaks or gets reused.
Files are processed in volatile memory (RAM) and purged the instant your download is ready — nothing is ever written to disk, cached or backed up.
Every upload and download is protected with TLS 1.3, so your e-book cannot be intercepted on the way to the server or back to you.
Convert instantly with no sign-up, no email and no profiling cookies. We never build a profile around you or the files you convert.
Runs in any modern browser on Windows, macOS, Linux, Android and iOS — no install, plugin or desktop software needed.
EPUB vs FB2 - Format Comparison
| Feature | EPUB | FB2 |
|---|---|---|
| File extension | .epub | .fb2 |
| Full name | Electronic Publication | FictionBook |
| Encoding | Binary | Text |
| Editable | No | Yes |
| Open standard | Yes | Yes |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
A converter you do not have to worry about
PrivConvert handles thousands of conversions every day for developers, designers and privacy-conscious people who need a e-book converted without handing over a permanent copy.