Free online AZW to FB2 converter
Convert AZW Kindle e-books to FB2 with Calibre and note DRM limits.
Convert AZW to FB2 online - free
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How to convert azw to fb2 file
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Source format: AZW
AZW is Amazon’s proprietary eBook format used mainly on Kindle devices and in the Kindle ecosystem. It is based on the older Mobipocket structure, but may include Amazon-specific features such as DRM protection, embedded metadata, and Kindle formatting enhancements. AZW files are commonly used for purchased or downloaded Kindle books, personal documents sent to Kindle, and older Kindle library content.
Target format: FB2
FB2 (FictionBook 2) is an XML-based eBook format designed to preserve the logical structure of a book rather than a fixed page layout. It is popular in some eBook readers and libraries, especially in Eastern Europe and among users who want a clean, structured format for novels and text-heavy books. FB2 supports chapters, sections, metadata, and basic formatting, and it is often appreciated for its portability and readability.
How to convert AZW to FB2
The most reliable desktop tool for this conversion is Calibre, a free eBook manager and converter that supports many input and output formats. It is especially useful when the AZW file is not DRM-protected.
- Install Calibre on your computer.
- Open Calibre and add the AZW file using Add books.
- Select the imported book in the library.
- Click Convert books.
- In the conversion window, choose FB2 as the output format.
- Review the settings if needed, especially Look & feel, Structure detection, and Metadata.
- Start the conversion and wait for Calibre to create the FB2 file.
- Find the result by right-clicking the book and choosing Open containing folder, or by checking Calibre’s output directory.
If you prefer a command-line workflow, Calibre’s conversion tool can also be used through its command-line utilities in advanced setups, but the graphical interface is usually the simplest option for AZW to FB2.
You can also convert the file on 101convert.com for free, without installing any software.
Notes on quality and limitations
DRM-protected AZW files cannot be converted legally or reliably unless the protection is removed by authorized means. Even for unprotected files, the conversion may not be perfect because AZW and FB2 handle formatting differently. Complex layouts, embedded fonts, tables, images, footnotes, and Kindle-specific styling may be simplified or lost. Text-heavy novels usually convert well, while heavily formatted books may need manual cleanup after conversion.
FB2 is best suited for reflowable reading on compatible apps and devices. If the source AZW contains rich Kindle features such as enhanced typesetting or interactive elements, those features will not carry over fully into FB2.
AZW vs FB2: format comparison
How the AZW and FB2 formats compare on the properties that matter most for this conversion.
| Property | .AZW Amazon Kindle eBook | .FB2 FictionBook 2.0 |
|---|---|---|
| Reflowable text | Yes | Yes |
| DRM protection | Optional | No DRM |
| Images | Yes | Yes |
| Metadata support | Extensive | Extensive |
| E-reader support | Wide | Limited |
| Typical file size | Small | Small |
| Open standard | No | Yes |
| Best used for | Publishing | Publishing |
| Introduced | — | 2004 |
| Developer | Amazon | FictionBook Team |
| MIME type | — | application/fb2+xml |
Suggested software and links: azw to fb2 converters
Frequently asked questions
Is the AZW to FB2 converter free?
Yes, converting AZW to FB2 on 101convert.com is completely free. No registration, email address or installation is required.
How large can my AZW file be?
You can upload AZW files up to 1000 MB and convert up to 50 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert AZW to FB2?
No. The AZW to FB2 conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid AZW file for this AZW to FB2 conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.