Flip a list upside down, so the last line becomes the first.
first second third
third second first
No. It reverses the order you pasted, whatever that was. Sorting puts lines in alphabetical order instead.
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.