Free Online AZW3 to FB2 Converter
Convert AZW3 to FB2 online for free.
Drop AZW3 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.
AZW3 vs FB2: Side-by-side
Technical comparison of the two formats, useful for deciding which to use, or for confirming what changes during conversion.
| Property | AZW3 | FB2 |
|---|---|---|
| Full name | Kindle Format 8 | FictionBook 2 |
| Year introduced | 2011 | 2004 |
| Developer / standard body | Amazon | FictionBook (open) |
| MIME type | application/vnd.amazon.ebook | application/x-fictionbook+xml |
| File extension | .azw3 | .fb2 |
| Compression | Variable | XML (typically uncompressed) |
| Color / data depth | N/A | N/A |
| Max dimensions / size | Software-limited | Software-limited |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | Amazon | FictionBook (open) |
| Best for | Modern Kindle devices, enhanced typography and layout | Russian-speaking ebook community, lightweight ebook archiving |
Frequently asked questions
Can I convert AZW3 books to FB2 for my Kindle or Kobo?
Yes. Upload your AZW3 ebook and it converts to FB2 with chapter structure, cover art, and formatting preserved. Load the FB2 onto your Kindle, Kobo, Nook, or any eReader that supports the format.
How to convert AZW3 to FB2 without losing the table of contents
Chapter navigation, the cover image, and text formatting all carry over during conversion. The FB2 has proper chapter links so you can jump between sections on your eReader just like the original AZW3.
Can I convert multiple AZW3 ebooks to FB2 at once?
Yes. Upload a batch of AZW3 files and they are all converted to FB2. 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 FB2?
Yes. FB2 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 FB2 for?
FB2 is the FictionBook ebook format best for FictionBook readers. Convert your AZW3 to FB2 when your eReader or app opens FB2 more reliably, so the whole library works on one device.
How do I open AZW3 files?
On Windows: Calibre, or a Kindle device. On a Mac: Calibre, or Kindle for Mac. Kindle's format. DRM-protected purchases will not open outside Kindle apps, and no converter can change that.