Koreader can read files stored/compressed in ZIP files. For example, a TXT file can be compressed and stored in a ZIP file to save space. There is an expected naming convention where the filename ends in .FORMAT.ZIP, for example for a compressed text (TXT) file the file should end in `.txt.zip`
Koreader can read files stored/compressed in [ZIP files](https://en.wikipedia.org/wiki/ZIP_(file_format)). For example, a TXT file can be compressed and stored in a ZIP file to save space. There is an expected naming convention where the filename ends in .FORMAT.ZIP, for example for a compressed text (TXT) file the file should end in `.txt.zip`
Koreader does not create zip files nor does it offer ZIP browsing support.