QQuickKit

Remove Duplicates

Remove duplicate lines from any block of text. Choose case-insensitive matching or whitespace trimming to control what counts as a duplicate.

About This Tool

Remove duplicate lines from any block of text in one click. Paste a list, choose whether matching should be case-insensitive or should first trim leading and trailing whitespace, and get a deduplicated result instantly. Useful for cleaning word lists, deduplicating CSV exports, filtering log lines or ensuring unique entries in configuration files.

Features

  • ✓Case-insensitive Matching — Optionally treat "Apple" and "apple" as the same line.
  • ✓Whitespace Trimming — Optionally trim spaces from both ends of each line before comparing, so " hello" and "hello " are treated as duplicates.
  • ✓Removal Count — Shows exactly how many duplicate lines were removed.
  • ✓Order Preserved — The first occurrence of each line is kept; subsequent duplicates are removed. The relative order of unique lines is unchanged.

FAQ

What counts as a duplicate?
By default, lines must match exactly (same case, same spacing) to be duplicates. Enable "Ignore case" and/or "Trim whitespace" to broaden the matching.
Are blank lines treated as duplicates of each other?
Yes. Multiple consecutive blank lines will be collapsed to a single blank line when deduplication runs.
Does the tool change the order of lines?
No. The first occurrence of each unique line is kept in its original position. Only later duplicates are removed.

Further Reading