Google Docs is good, but since it usually requires an internet connection to use, things made when you are offline can be challenging. If you use Google Chrome, an official extension named Google Docs will be changed offline.
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Note! Using Google Docs Offline requires Google's official Chrome extensions, so you can only use it in Google Chrome. It works for documents, discs and images, but not forms.
How to use Google Docs offline
First, you need to install the Google Docs Chrome extension offline. After installation, you will find a new setting in all the main Google apps that allow you to set things up for offline use. When you enable that setting in an app, it is automatically enabled in all supported Google apps, so you don't have to go to each app to activate it.
We work with Google Docs in our example, but it works the same in pictures and discs. In the app, click the hamburger icon in the upper left corner and then click "Settings."
In the Settings window, switch the "Offline" switch
If you do so, you can enable offline mode in all Google Drive applications (Documents, Sheets and Slide).
In an attempt to save space locally, Google Docs saves only recently accessed files locally for offline use. You need to activate it manually by clicking the three-dot icon on the side of a particular document and then switching "Available offline" to access your file anywhere.
 All files available offline display a gray selection marker in the lower left corner of your Docs, Presentations, or Sheets home page.
Now that you open the file in offline mode, a flash bolt icon appears at the top of the document, which means that you open the file while it is offline.
Now you can create, open and edit files without connecting to the internet. The next time your computer connects to a network, any changes you make to Google's servers will be synchronized.