ZIP Writer add-on help you easily convert your file(s) to a single compressed file (.zip).
Simply drag & drop files to a designated area in the app UI (top section). All the uploaded files will be listed in the UI. You can now click on the - Download ZIP file - button in order to download the ZIP file to your system (default download location).
There is also a reload button at the top left corner in the app UI. Clicking on this button will reload the app and resets all active operations. If you want to zip multiple files, please drag & drop them altogether in the app (top section). It is also necessary to reload the UI after each zip operation.
Please note that, this add-on is only designed to make compressed zip files. If you want to extract a zip folder (unzip), please install my other add-on: ZIP Reader (https://addons.opera.com/en/extensions/details/zip-reader/)
Note: with this add-on you can only compress files, not a folder/sub-folders. If you have a folder with multiple files/folders in it, please first move all the files to a single folder (without any sub-folders) and then use this add-on to compress them.
If you found a bug to report, or have feature request, please fill the bug report form in the addon's homepage (http://mybrowseraddon.com/zip-maker.html).