How to convert MOBI to FictionBook (FB2)
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert MOBI to FictionBook (FB2)
NexMedia converts MOBI to FictionBook (FB2) on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About MOBI
MOBI is the Mobipocket ebook format, which Amazon acquired in 2005 and used for the first Kindles.
Older Kindle devices and ebook collections from before AZW3.
MOBI supports only basic formatting, and Amazon's Send to Kindle no longer accepts MOBI files.
Convert MOBI to FB2 online free, no account required — FB2 is an XML-based ebook format.
Change MOBI to FB2 without losing quality — convert MOBI to FB2 free in your browser.
Why won't Amazon accept my MOBI file for the Kindle anymore? Amazon retired the old MOBI format for personal documents, and modern Kindles expect EPUB or AZW3 instead — converting keeps the book readable.
About FictionBook (FB2)
FictionBook (FB2) is an XML-based ebook format that describes the structure of a book (sections, titles, notes) rather than its appearance.
Ebooks in Russia and Eastern Europe, where many free libraries offer FB2.
Kindle and Apple Books do not read FB2, and its styling options are minimal.
Why convert an ebook to FB2? For Russian-language readers and apps built around FictionBook, where metadata and structure map cleanly.
What changes when you convert MOBI to FB2
- Ebook conversion is best-effort: the text, images and table of contents of the MOBI carry over to FB2, but layout and styling can change.
- Fixed layouts, embedded fonts and complex styling in the MOBI may not survive the move to FB2.
- MOBI files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.
Settings you can change
Before you convert MOBI to FB2, you can adjust: Title, Author, Language, Page size, Base font size, and Generate table of contents.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted FB2 file is kept for 2 hours, then deleted.
MOBI to FB2: questions and answers
Does converting MOBI to FB2 reduce quality?
Ebook conversion is best-effort: the text, images and table of contents of the MOBI carry over to FB2, but layout and styling can change.
What is the difference between MOBI and FB2?
MOBI is the Mobipocket ebook format of early Kindles. FB2 is an XML-based ebook format.
Can I change the settings when converting MOBI to FB2?
Before you convert MOBI to FB2, you can adjust: Title, Author, Language, Page size, Base font size, and Generate table of contents.
Do I need an account to convert MOBI to FB2?
No. You can convert MOBI to FB2 without an account; signing in raises the file-size and daily limits.
How long is my converted FB2 file kept?
The FB2 file you convert from MOBI is kept for 2 hours, then deleted automatically.
Will the page layout of my MOBI survive in the FB2?
Fixed layouts, embedded fonts and complex styling in the MOBI may not survive the move to FB2.
What happens if my MOBI file is copy-protected?
MOBI files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.