Requirements Install pyglossary pip3 install pyglossary Install Kindle Previewer Download Kindle Previewer (At the time of writing, Kindle Previewer version 3.88.0 ( Windows ).) Step 1: Convert Dictionary Data to .mobi Format with Pyglossary Pyglossary will generate a folder (e.g., mydict.mobi ) instead of a .mobi file. Within this folder, navigate to the OEBPS directory, where you'll find the content.opf file. Step 2: Preview the content.opf File in Kindle Previewer Open Kindle Previewer and go to File > Open Book (or press Ctrl + O ). Select the content.opf file you found in Step 1. Note: The preview may take some time to process, depending on the size of your dictionary. Tip: To speed up the preview, you can duplicate the content.opf file (e.g., content_min.opf ) and remove most .xhtml files from the manifest and spine sections, leav...