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Epub metadata editor1/23/2024 Not every ZIP software will allow such "delicate" changes to a ZIP file. So before using a ZIP software to tweak your EPUB files, make sure that the software will preserve the original order of files, and leave the "mimetype" file uncompressed. This "mimetype" file must always be stored within the EPUB package in uncompressed form. The first file in any proper EPUB package must be "mimetype", and it is always a 20-byte ASCII file containing this string of text: There is one important detail to remember when you modify an EPUB file in a ZIP software. Note that an EPUB file (package) normally contains multiple files in different formats: XHTML, XML, JPG, etc. To recover a working EPUB package (file), you finally need to change the file extension back to ".epub" (instead of ".zip"). You can then extract files of interest, modify them in a text editor, and put them back in the ZIP file. So if you rename an EPUB file by changing its ".epub" extension to the ".zip" extension, you'll be able to open the newly-renamed ".zip" file in any file compression software, and view the files contained within the original EPUB package. This can be done with the tweak_epub utility, irrespective of whether the EPUB files were generated by Atlantis or by another application.īefore explaining how to use the "tweak_epub" utility, let's first take a look at the inner workings of EPUB files.Īll EPUB files are actually ZIP files with ".epub" as their filename extension instead of ".zip". However, at times you might want to make adjustments to EPUB files that are not possible directly through the GUI of Atlantis. And when you need to make a change to an eBook, all you need to do is modify the corresponding source document in Atlantis, then resave it as eBook. With Atlantis Word Processor, you can convert any document file into an eBook in the EPUB format. Example: adding metadata to EPUB General information
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