Duplicate Line Remover This tool helps you quickly clean and organize line-based text data. It reads your input line by line, removes all duplicate lines, and keeps only the unique ones.

• How It Works: The tool preserves the first occurrence of each unique line and removes all subsequent identical lines.
• Case-sensitive: By default, the tool is case-insensitive (e.g., 'Apple' and 'apple' are treated as the same). If you want to distinguish between them, check the 'Case-sensitive' option.
• Keep empty lines: By default, the tool keeps a single unique empty line. If you want to remove all empty lines, you can uncheck this option.
• Use Cases: Ideal for cleaning log files, organizing data lists, processing email address lists, deduplicating code, and other similar tasks.
• Pure Frontend Processing: All data is generated locally in your browser. We do not record or store any of your data structures, ensuring speed and privacy.