Free Online FB2 to AZW3 Converter
Convert FB2 to AZW3 online for free.
Drop FB2 files here
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Up to 50 MB per file. Sign up free to convert files up to 100 MB.
Selected files
| File name | Size | Convert to |
|---|
Preparing files
Checking files and selected output formats.
FB2 vs AZW3: Side-by-side
Technical comparison of the two formats, useful for deciding which to use, or for confirming what changes during conversion.
| Property | FB2 | AZW3 |
|---|---|---|
| Full name | FictionBook 2 | Kindle Format 8 |
| Year introduced | 2004 | 2011 |
| Developer / standard body | FictionBook (open) | Amazon |
| MIME type | application/x-fictionbook+xml | application/vnd.amazon.ebook |
| File extension | .fb2 | .azw3 |
| Compression | XML (typically uncompressed) | Variable |
| Color / data depth | N/A | N/A |
| Max dimensions / size | Software-limited | Software-limited |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | FictionBook (open) | Amazon |
| Best for | Russian-speaking ebook community, lightweight ebook archiving | Modern Kindle devices, enhanced typography and layout |
Frequently asked questions
Can I convert FB2 books to AZW3 for my Kindle or Kobo?
Yes. Upload your FB2 ebook and it converts to AZW3 with chapter structure, cover art, and formatting preserved. Load the AZW3 onto your Kindle, Kobo, Nook, or any eReader that supports the format.
How to convert FB2 to AZW3 without losing the table of contents
Chapter navigation, the cover image, and text formatting all carry over during conversion. The AZW3 has proper chapter links so you can jump between sections on your eReader just like the original FB2.
Can I convert multiple FB2 ebooks to AZW3 at once?
Yes. Upload a batch of FB2 files and they are all converted to AZW3. Each book downloads separately or as a ZIP, so you can convert an entire library in one session.
Does the text still reflow after converting to AZW3?
Yes. AZW3 keeps text reflowable, so it adapts to any screen size and font setting on your eReader rather than being locked to a fixed page like a PDF.
Which reader is AZW3 for?
AZW3 is the AZW3 format best for its intended use. Convert your FB2 to AZW3 when your eReader or app opens AZW3 more reliably, so the whole library works on one device.
What is FB2?
FB2 is the FictionBook ebook format, typically used for FictionBook readers. Converting it to AZW3 produces a file that opens on systems without FB2 support.