Remove Duplicate Lines
Remove duplicate lines from text while preserving order.
$text with duplicates
0 chars1 lines
$unique lines[READY]
0 chars1 lines
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FAQ
- Does removing duplicates preserve the original order?
- Yes. The tool uses a Set to track seen lines and keeps only the first occurrence of each unique line in the order they appear. The relative order of unique lines is preserved exactly.
- Is the comparison case-sensitive?
- Yes, the comparison is case-sensitive by default. "Hello" and "hello" are treated as distinct lines. If you need case-insensitive deduplication, convert the text to a consistent case first using the Case Converter tool.
- How are blank lines treated?
- Blank lines are treated as regular lines. If your text has multiple consecutive blank lines, only the first blank line is kept. To remove all blank lines instead, use the Remove Empty Lines tool.
Remove Duplicate Lines filters out repeated lines from your text, keeping only the first occurrence of each unique line while preserving the original order. This is useful for cleaning up lists, deduplicating log entries, processing CSV rows, and eliminating redundant items from any newline-delimited data.