How are duplicates detected?

Duplicates are detected by comparing each line after applying your chosen options (trimming, case sensitivity). Exact matches are considered duplicates.

What's the difference between keeping first vs last occurrence?

If 'Keep first' is enabled, the first time a line appears is kept and subsequent duplicates are removed. If disabled, the last occurrence is kept instead. This can be useful when maintaining chronological order.

Are empty lines removed?

Yes, empty lines (after trimming) are automatically removed to keep the output clean.

Duplicate Lines Remover

Remove duplicate lines from text instantly. Keep first or last occurrence, case-sensitive or insensitive matching.

How to Use This Duplicate Lines Remover

1Paste your text into the input box.
2Adjust options like case sensitivity or which occurrence to keep.
3The tool automatically removes duplicates.
4Copy the cleaned text from the result box.

Features

✓Instant Detection: Automatically finds all duplicate lines
✓Duplicate Analysis: Shows which lines appear multiple times and how often
✓Flexible Matching: Case-sensitive or insensitive comparison
✓Keep First/Last: Choose which occurrence to preserve
✓Whitespace Handling: Option to trim whitespace before comparison
✓Real-time Stats: See how many duplicates were removed

About Duplicate Lines Remover

Quickly clean up duplicate lines in any text. Perfect for cleaning lists, log files, CSV data, or any multi-line content. See which lines are duplicated before removal.

Frequently Asked Questions

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Duplicate Lines Remover

Remove duplicate lines from text instantly. Keep first or last occurrence, case-sensitive or insensitive matching.

How to Use This Duplicate Lines Remover

1Paste your text into the input box.
2Adjust options like case sensitivity or which occurrence to keep.
3The tool automatically removes duplicates.
4Copy the cleaned text from the result box.

Features

✓Instant Detection: Automatically finds all duplicate lines
✓Duplicate Analysis: Shows which lines appear multiple times and how often
✓Flexible Matching: Case-sensitive or insensitive comparison
✓Keep First/Last: Choose which occurrence to preserve
✓Whitespace Handling: Option to trim whitespace before comparison
✓Real-time Stats: See how many duplicates were removed

About Duplicate Lines Remover

Quickly clean up duplicate lines in any text. Perfect for cleaning lists, log files, CSV data, or any multi-line content. See which lines are duplicated before removal.