At this time, the following file types can be uploaded to the Grammarly Editor: MS Word (.doc, .docx), OpenOffice (.odt), .txt and .rtf.
Please note that you can save your documents in .docx or .doc format using Pages. Follow the steps below:
Step 1: Open the file you want to convert into a .docx/.doc document.
Step 2: From the menu bar, click on File → Export To.
Step 3: Then, click on Word
Step 4: Next, click on Advanced Options. You should see a drop-down labeled Format.
Step 5: Now, choose the appropriate extension – ".docx" or ".doc"
Step 6: Click on Next.
Step 7: Type a name for the word document, pick a destination, and click Export.