Duplicate Text / Line Remover

The work happens in your browser with a local pass: what you paste is never uploaded or stored. Each line is compared against the ones already kept, and a repeat is dropped while the first occurrence stays. Preserving order keeps that first occurrence exactly where it was, which matters when the sequence means something; sorting instead gives you the unique values in alphabetical order. Case sensitivity is yours to choose, so Apple and apple can count as the same entry or as two. Lines that differ only in spaces, or in how an accent is encoded, count as the same line, and blank lines between groups are kept rather than treated as duplicates; untick Ignore extra spaces for an exact comparison, or tick Remove empty lines to drop them.

Where it stops: A duplicate here means the same words: extra spaces and differently encoded accents are ignored, but a different kind of quotation mark, or one entry written slightly differently, still reads as distinct, so run Text Cleaner first if the list came from somewhere messy. Paragraph mode needs blank lines between paragraphs to know where they start and end, and very large lists will be slower because every line is compared against those kept before it.