𧚠Remove Duplicate Lines â Clean Text & Lists Instantly
Instantly deduplicate text, lists and data â with case options, sort, and blank line removal. Free & browser-based.
How to Use the Remove Duplicate Lines Tool
- Paste your text: Paste your list, CSV column, email list, or any multi-line data that may contain duplicates.
- Choose options: Enable Case-insensitive to treat "Apple" and "apple" as duplicates. Sort Output for alphabetical order. Remove Blank Lines to strip empty rows. Trim Whitespace to clean each line.
- Click Remove Duplicates: Process your text instantly. Unique lines appear in the output area.
- Read the stats: See total lines, unique lines kept, and duplicates removed.
- Copy the result: Click Copy Output to copy to clipboard.
Key Features
Duplicate Removal
Keeps only first occurrence of each unique line.
Case-Insensitive Mode
Treats "Apple" and "apple" as duplicates.
Sort Output
Sort unique lines alphabetically.
Blank Line Removal
Strip empty lines from output.
Live Stats
See total, unique, and removed counts.
100% Private
All processing in your browser. No data leaves your device.
Frequently Asked Questions
Is this remove duplicate lines tool free?
Yes, completely free with no registration required.
What is case-insensitive mode?
In case-insensitive mode, "Apple" and "apple" are treated as the same line and only the first is kept.
Does this tool sort the output?
Optionally. Enable Sort Output checkbox and unique lines will be sorted alphabetically.
Is my data safe?
Yes. All processing happens in your browser. No text is sent to any server.
How many lines can this handle?
The tool can handle thousands of lines. Processing is instant on modern devices.