Remove Duplicate Lines
Our free Remove Duplicate Lines tool processes your text directly in your browser. Effortlessly remove repeated lines, preserve first or last occurrences, filter case sensitivity, trim spaces, and sort your clean lists alphabetically.
How to Use Remove Duplicate Lines
- 1Paste your raw text or list into the large text input area.
- 2Configure deduplication settings like case sensitivity, occurrence preference, and sorting.
- 3View your deduplicated list and line statistics automatically.
- 4Click "Copy Result" or "Download TXT" to export your clean text.
Key Features
- Preserve first occurrence or preserve last occurrence
- Case-sensitive or case-insensitive matching options
- Remove empty lines & trim extra whitespace
- Sort output alphabetically (A-Z or Z-A)
- Real-time line counts for original vs unique lines
- 100% Client-side processing — zero server uploads
Example Usage
Apple banana Apple Orange banana
Apple banana Orange
Note: Duplicate occurrences of 'Apple' and 'banana' were removed, preserving the first instance of each.
Frequently Asked Questions
Does this tool upload my text to any server?▼
No. All processing happens entirely within your web browser using JavaScript. Your text never leaves your device.
What is the difference between Case-Sensitive and Case-Insensitive mode?▼
In Case-Sensitive mode, "Apple" and "apple" are treated as distinct items. In Case-Insensitive mode, they are treated as identical duplicates.
How large can my text file be?▼
Since deduplication runs locally in your browser memory, it can handle thousands of lines in milliseconds smoothly.
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