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Text Deduplicator

Remove duplicate lines from text. Keep only unique lines with optional case-insensitive matching.

When working with lists of emails, URLs, keywords, or any line-based data, duplicates creep in easily. This text deduplicator removes all duplicate lines from your text, keeping only the first occurrence of each unique line. You can optionally enable case-insensitive matching and automatic whitespace trimming.

The tool preserves the original order of lines and reports how many duplicates were removed. Everything runs in your browser with no data sent to any server.

Deduplicator

Results

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How to Use

  1. Paste your text with one item per line
  2. Optionally enable case-insensitive matching or line trimming
  3. Click Calculate to remove duplicates
  4. Copy the deduplicated text from the output

FAQ

Does it preserve the original order?

Yes. The tool keeps the first occurrence of each unique line and preserves the original order.

What does case-insensitive matching do?

When enabled, lines that differ only in capitalization (e.g., 'Hello' and 'hello') are treated as duplicates.

Is my text stored anywhere?

No. All processing happens in your browser. Your data never leaves your device.

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