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How to Convert EPUB to MOBI
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Why Use Our EPUB to MOBI Converter?
- Live terminal logs — watch every step of your conversion in real time
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When Do You Need to Convert EPUB to MOBI?
MOBI is the format older Kindles read. Converting EPUB to MOBI is what you do for a first or second generation device, or for software that still expects Amazon's older format, when the book you have is a standard EPUB.
What Happens When You Convert EPUB to MOBI
Calibre converts the EPUB's HTML and CSS into MOBI. The format is considerably more limited than EPUB, so styling is simplified: MOBI supports only a small subset of CSS, and tables, multi-column layouts, drop caps and embedded fonts are flattened or dropped. Text, chapter structure, images and the table of contents survive. For plain prose the result is close to the original. For anything designed, expect it to look plainer.
Worth knowing before you convert
Fixed layout books such as comics and picture books convert badly, since MOBI is built for reflowing text.
About EPUB and MOBI
application/epub+zip
EPUB is the industry-standard open format for digital books and publications. It features reflowable text that adapts to different screen sizes, fonts, and accessibility needs. EPUB is supported by most e-readers, tablets, and reading applications except Amazon Kindle.
application/x-mobipocket-ebook
Legacy Amazon Kindle format.
Conversion Notes
eBook conversion preserves chapter structure, headings, and paragraph text. Complex layouts, custom fonts, and CSS styling may be simplified if the target format has more limited presentation capabilities. Images are embedded and resized to fit the target format's constraints. Tables of contents and internal hyperlinks are carried over where supported.
Frequently Asked Questions
AZW3 for any Kindle made in roughly the last decade, since it supports far more formatting. MOBI only for genuinely old hardware.