Flip every letter: capitals become small and small letters become capitals. The quickest fix for text like hELLO wORLD.
How to swap upper and lower case
Paste the text into the top box.
Every letter is flipped in the result box straight away.
Copy the result, or click Sentence case if you want tidy sentences instead.
Example
dEAR mR sMITH, tHANK YOU FOR YOUR EMAIL.
becomes
Dear Mr Smith, Thank you for your email.
Notice how the names keep their capitals. That is the advantage of inverse case over sentence case when the only problem was caps lock: anything you capitalized on purpose comes back correctly.
Other uses
Fixing text pasted from an old system that stored names in reverse case.
Creating a quirky look for a design or a username.
Testing whether a form or search box treats upper and lower case the same.
Frequently asked questions
What does inverse case do?
It swaps the case of each letter. "Hello World" becomes "hELLO wORLD", and running it again brings back the original.
When is this useful?
Mostly when you typed with caps lock on but still pressed Shift for capitals. That gives you text like "tHIS IS mY nAME". Inverse case turns it into "This is My Name" in one step.
Is inverse case the same as toggle case?
Yes. Toggle case, swap case and invert case all describe the same thing.
Does it change anything other than letters?
No. Numbers, spaces, punctuation and emoji stay as they are.
