Turn text into aLtErNaTiNg CaSe, flipping between lower and upper case on every character. Popular for the mocking-tone meme.
hello world
hElLo wOrLd
No. It runs across the whole text by character position, spaces included, which is what gives it the familiar look.
No. This tool runs entirely in your browser — nothing you type or paste is uploaded, logged or stored anywhere.
There is no fixed limit. Very large documents depend on your device’s memory, but ordinary pages and files are handled instantly.