iOS 13 adds a few much needed features to the Files app and one of these is the ability to open ZIP and other compressed files, as well as the ability to create such files on your device. This feature is baked into Files app on iOS 13, it is much closer to how the Finder works on Mac. The Files app can open ZIP and TAR files, and it can compress your files into the ZIP format. The Files app in iOS 13 lets you unpack archives and save storage by compressing a bunch of files. You can compress files on your iPhone and open ZIP files without need for a third-party app. Just tap and hold a file or folder to bring up the contextual menu, then select Compress to create a ZIP archive.
How to Zip and Unzip Files on iPhone and iPad
Open the Files app and find the Zip or Tar file.
Tap on the Zip file, and automatically all the content will be extracted to a folder of the same name.
Alternatively, you can tap and hold the file, then tap Uncompress.
To create a ZIP file, simply open the Files app and put all the files that you want to zip in a single folder.
Go back and tap the Select button at the top and select the folder you just created.
Tap the three-dot icon present in the bottom-right corner, and tap Compress.
Your zip file will appear with the same name and you will then be able to share it or save it.
You want to zip just a single file, open the Files app and tap and hold any file, then select Compress.