Toggle Case
Flip uppercase letters to lowercase and vice versa.
Loading tool…
About this tool
Typed a whole sentence with caps lock on, or received text in the exact opposite case of what you need? Toggle case inverts every letter: capitals become small, small letters become capitals. It is the fastest fix for inverted-caps accidents and a fun way to produce aLtErNaTiNg-style text from normal input.
Non-letter characters — numbers, punctuation, spaces — pass through untouched, so only the casing flips.
How to use
- Paste or type your text into the input box.
- Every letter flips case instantly with a live preview.
- Copy the result or download it as a text file.
- Clear to convert something new.
Frequently asked questions
Each uppercase letter becomes lowercase and each lowercase letter becomes uppercase. "Hello World" becomes "hELLO wORLD". Numbers and punctuation are unaffected.
Not quite — caps-lock text like "HELLO" becomes "hello" with toggle case, which is correct. But mixed text like "hELLO" becomes "Hello", which is exactly what you want after an accidental caps-lock start.
Yes, case flipping is Unicode-aware, so accented letters like É and é swap correctly.