Remove repeated lines and keep the first of each, preserving the original order of everything that survives.
banana apple cherry apple date
banana apple cherry date
The first one. Order is preserved, so the list stays in the sequence you pasted.
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.