Import / export single pages?

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Hey there,
is there a possibility to export single pages to a local storage and to import them again, later? Maybe an add on? Didn't find anything.
For some testing, I am working with a copy of our homepage at our internal server, but since I do updates at the online-homepage, too, I can't simply copy the whole test-homepage from our server to the "real" one without loosing some stuff I added there in the meantime.
Thank you for your help!