How long will cooked meatballs stay fresh?

Answer 1

You most certainly can, but whether it is advisable depends upon it's state when it was 'out' and where it had previously have been 'in' - one presumes either a pressurised can or bottle or frozen or refrigerated.

Then it will depend on the character of the place it has been 'out' - including the temperature and whether it has been covered or exposed to a noxious atmosphere.

I understand that within the catering industry in Europe that food that has been at room temperature, say '15 - 20° Centigrade' is recommended to only be 'out' for a limited time of maybe 2 hours before it is consumed or put 'in' or discarded.

Answer 2

Yes, any food left out for 48 hours is unsafe to eat and should be thrown out.

Answer 3

If by "fresh," you mean safe to eat, cooked meatballs should be good refrigerated for 3 to 4 days. If you wish to keep them longer, you should freeze them.