Should I target MOBI, AZW3, or EPUB for my Kindle?

MOBI earns its keep only on pre-2012 Kindle hardware. Newer devices typeset AZW3 far better, and Send-to-Kindle now takes EPUB directly while it stopped accepting MOBI uploads in 2022 — so match the target to your device and delivery route.

How do FB2's footnotes come out in MOBI?

As linked endnotes: MOBI has no popup mechanism, so tapping a reference jumps to the note text and back. Functional but clumsy compared with what FB2 readers or KF8 popups offer — if your book leans on notes, AZW3 is the kinder target.

Will Cyrillic text display properly on the Kindle?

Yes — conversion passes the UTF-8 text through unchanged, and Kindles have shipped Cyrillic-capable fonts for many years. Only the very earliest models had patchy non-Latin coverage, and those may need a font workaround.

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Convert FB2 to MOBI

Turn FB2 files into MOBI in seconds — free, secure, and no signup required.

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Converting FB2 to MOBI brings FictionBook titles into the Amazon Kindle ecosystem, where FB2 isn't natively supported, so you can read them on Kindle devices and apps.

Convert FB2 to MOBI – Free Online FB2 to MOBI Converter

Why convert FB2 to MOBI?

Read FB2 library books on Kindle hardware and apps.
Use Send-to-Kindle workflows that expect MOBI.
Keep classic FictionBook titles accessible on modern devices.

How to convert FB2 to MOBI

Upload your FB2 file using the area above.
MOBI is preselected as the target format.
Click Start and wait for the conversion to finish.
Download your converted MOBI file.

Convert to MOBI

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FB2 to MOBI — Frequently Asked Questions