can I open mac .pages files on a PC?

Is there a way for me to open a .pages document from a customer using my pc computers? Is there a .pages viewer?

 

If you have to, you can rename the .pages file to .pages.zip
Then you can look through it like a normal .zip file
You'll see it contains a folder named QuickLook and within the QuickLook folder is a Preview.pdf and a tiny thumbnail image.
At least this allows you to see what the .pages file is and get the page's text.

I don't think there is a full pc viewer - best to have your customer export their pages file as a pdf for you.