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Duplicate Line Remover

100% Client-Side

Remove repeated lines, email lists, keywords, and URLs with configurable case sensitivity, whitespace trimming, and duplicate counters.

Original Lines

Unique Lines

Trim whitespace before comparing Case-sensitive comparison Remove blank / empty lines

Original: 0

Unique: 0

Duplicates Removed: 0

How to Use Duplicate Line Remover

Paste Your List

Paste a list of lines, URLs, tags, or records into the input box.

Configure Rules

Choose case-sensitivity, trimming, and whether to keep first or last occurrences.

Extract Clean List

Copy deduplicated lines or download the cleaned file.

✓ Live Deduplication Stats

Displays original line count, unique count, and total duplicates eliminated.

✓ Whitespace Normalization

Optionally ignores leading or trailing spaces during comparison.

✓ Zero Data Leaks

Private lists, customer emails, and keys never leave your browser.

🔒 Complete Client-Side Isolation

This tool runs entirely in your local browser runtime. No logs, analytics tracking, or remote server transmissions occur.

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