Google Docs and Drive have an offline mode that allows you to create and edit documents without an internet connection. Anything you do will sync with the online version when you're back online.

How to Set Up and Use Google Docs Offline Whether commuting to work or flying in first class, you can still access Google Drive files offline.

The Google Drive application for desktop lets you access content on your Windows or macOS computer. If you use the browser, you must turn on offline access to view and edit files in Google Docs ...

Microsoft 365 is the de facto option. But if you just need to open, edit, and create basic documents, you don’t have to spend anything.