Hi there, 

Thanks for reaching out in the Community. I'll be glad to answer your questions from here.

At this time, there isn't an option to export invoices out outside of QuickBooks. You can use third-party apps to export your invoices and I encourage you to check out some these apps using this link: www.apps.com. Once you click on the link, you'll be brought to a site where you can enter the keywords "export invoice" and you'll see a list of results. I recommend picking an app which matches your business needs. 

Give this a try and keep me posted on how you make out. I'll be on standby in case you need anything else. Otherwise, enjoy the rest of your week. :)