ebook-convert
Installation
SKILL.md
Ebook Conversion
ebook-convert from Calibre. Basic usage:
ebook-convert input.epub output.mobi
Output format is inferred from the output file extension. Supported: mobi, azw3, epub, pdf, txt, docx, fb2, and more.
Format choice matters
- mobi legacy; Amazon stopped accepting it for Send-to-Kindle in 2022, new Kindles don't read it. Only when explicitly requested.
- azw3 modern Kindle format, keeps formatting/CSS best. Prefer for Kindle devices.
- epub universal; Kindle (2022+) and Send-to-Kindle accept it directly, no conversion needed.