According to the American Egg Board, you can store unpeeled hard-boiled eggs in the refrigerator for up to a week.
Once peeled, hard-boiled eggs should be eaten on the same day to ensure freshness.
The protective coating on eggs is washed away during boiling, exposing the shell to bacteria and reducing storage time compared to fresh eggs.
If taking hard-boiled eggs to work, store them in the office fridge upon arrival to keep them fresh.
Spin the egg on a flat surface to determine its status—hard-boiled eggs will spin smoothly, while raw eggs will wobble due to their liquid contents.
A slight gassy smell from hard-boiled eggs is normal and harmless, caused by hydrogen sulphide formation during cooking.
Discard eggs that exhibit sliminess, chalkiness, or a strong rotten odor, as these are signs of spoilage.