EBOOK-POLISH(1)                     calibre                    EBOOK-POLISH(1)

NAME
       ebook-polish - ebook-polish

          ebook-polish [options] input_file [output_file]

       Polishing books is all about putting the shine of perfection onto your
       carefully crafted e-books.

       Polishing tries to minimize the changes to the internal code of your
       e-book.  Unlike conversion, it does not flatten CSS, rename files,
       change font sizes, adjust margins, etc. Every action performs only the
       minimum set of changes needed for the desired effect.

       You should use this tool as the last step in your e-book creation
       process.

       Note that polishing only works on files in the AZW3<?><?><?><?><?>EPUB
       formats.

       Whenever you pass arguments to ebook-polish that have spaces in them,
       enclose the arguments in quotation marks. For example: "/some path/with
       spaces"

[<?><?><?><?><?><?>]

       --add-soft-hyphens, -H
              Add soft hyphens to all words in the book. This allows the book
              to be rendered better when the text is justified, in readers
              that do not support hyphenation.

       --compress-images, -i
              Losslessly compress images in the book, to reduce the filesize,
              without affecting image quality.

       --cover, -c
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              <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?><?> <?><?><?><?><?>. <?><?>
              <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?><?><?> <?><?><?><?>, <?><?><?><?><?>
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              <?><?><?> <?><?><?><?>, <?><?> <?><?><?><?>
              <?><?><?><?><?><?><?><?><?> <?><?><?><?><?>.

       --download-external-resources, -d
              Download external resources such as images, stylesheets, etc.
              that point to URLs instead of files in the book. All such
              resources will be downloaded and added to the book so that the
              book no longer references any external resources.

       --embed-fonts, -e
              Embed all fonts that are referenced in the document and are not
              already embedded. This will scan your computer for the fonts,
              and if they are found, they will be embedded into the document.
              Please ensure that you have the proper license for embedding the
              fonts used in this document.

       --help, -h
              <?><?> <?><?><?><?><?><?> <?><?><?><?><?> <?><?><?><?><?><?>
              <?><?><?><?><?> <?><?><?>

       --jacket, -j
              <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?>
              <?><?> "<?><?><?><?><?><?><?><?><?> <?><?><?><?><?>" <?><?><?>
              <?><?><?><?>, <?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
              <?><?><?><?> <?><?><?><?><?><?><?><?> <?><?><?><?>, <?><?><?>
              <?><?> <?><?><?><?><?><?>, <?><?><?>, <?><?><?><?>,
              <?><?><?><?><?><?>, <?><?><?><?><?><?><?><?><?>, <?><?>. <?><?>
              <?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?> <?><?><?><?> <?><?><?><?>.

       --opf, -o
              OPF <?><?><?><?><?><?><?> <?><?><?>.
              <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> OPF
              <?><?><?><?><?><?><?><?> <?><?><?><?><?> <?><?><?><?>
              <?><?><?><?>.

       --remove-jacket
              <?><?><?><?><?> <?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>
              <?><?><?> <?><?><?><?><?> <?><?><?><?>.

       --remove-soft-hyphens
              Remove soft hyphens from all text in the book.

       --remove-unused-css, -u
              Remove all unused CSS rules from stylesheets and <style> tags.
              Some books created from production templates can have a large
              number of extra CSS rules that don't match any actual content.
              These extra rules can slow down readers that need to parse them
              all.

       --smarten-punctuation, -p
              Convert plain text dashes, ellipsis, quotes, multiple hyphens,
              etc. into their typographically correct equivalents. Note that
              the algorithm can sometimes generate incorrect results,
              especially when single quotes at the start of contractions are
              involved.

       --subset-fonts, -f
              Subsetting fonts means reducing an embedded font to contain only
              the characters used from that font in the book. This greatly
              reduces the size of the font files (halving the font file sizes
              is common). For example, if the book uses a specific font for
              headers, then subsetting will reduce that font to contain only
              the characters present in the actual headers in the book. Or if
              the book embeds the bold and italic versions of a font, but bold
              and italic text is relatively rare, or absent altogether, then
              the bold and italic fonts can either be reduced to only a few
              characters or completely removed. The only downside to
              subsetting fonts is that if, at a later date you decide to add
              more text to your books, the newly added text might not be
              covered by the subset font.

       --upgrade-book, -U
              Upgrade the internal structures of the book, if possible. For
              instance, upgrades EPUB 2 books to EPUB 3 books.

       --verbose
              Produce more verbose output, useful for debugging.

       --version
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              <?><?><?> <?><?> <?><?><?><?><?> <?><?><?>

AUTHOR
       Kovid Goyal

COPYRIGHT
       Kovid Goyal

7.17.0                     <?><?><?><?><?> 23, 2024            EBOOK-POLISH(1)