How to turn SHOUTING posts (100% higher case) into sentence case?

[Alpha1]

I would like to turn all old posts that exclusively contains higher-case text, into sentence case. Is this possible somehow?
If so, how? (Query, addon, Kiers post replace addon, or something else)

 

[🔥Iggy🔥]

well with css there is "text-transform"....i know that at least ;P

 

[beerForo]

CSS sounds like the perfect solution. If you ever have regrets, you can remove it and the db is untouched. Plus, much less work!

 

[Alpha1]

If possible I would like to change the post content itself.