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ToolNest AI
Free

Remove Duplicate Lines

Remove duplicate lines from your text instantly while preserving the original order.

Options

Output
Original Lines0
Unique Lines0
Removed0
Characters0
Words0

About Remove Duplicate Lines

Paste any text and remove duplicate lines in one click. Choose case-sensitive or case-insensitive comparison, optionally trim whitespace before comparing, and decide whether to keep the first or last occurrence of each line. The output preserves the original line order. Ideal for cleaning up log files, word lists, CSV rows, code snippets, and any text with unwanted repetition.

Frequently Asked Questions

It scans your text line by line and removes any line that has already appeared earlier in the text, giving you a clean list of unique lines.

Yes. The tool never sorts your text. It simply removes repeated lines while keeping the remaining lines in exactly the order they appeared.

Yes. Toggle the Case-Insensitive option and lines like 'Hello' and 'hello' will be treated as duplicates. The retained line keeps its original casing.

Completely. All processing happens in your browser using JavaScript. Nothing is ever sent to a server, so your text stays entirely private.

Yes, completely free with no account required, no usage limits, and no watermarks on exported files.

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