How to Use This Tool
1. Paste Your Text
Copy the text or list from which you want to remove duplicate lines and paste it into the left input box. The tool will instantly show you line and duplicate counts.
2. Choose Your Options
On the right side, select your preferences. Check "Case-sensitive matching" if you want "Apple" and "apple" to be treated as different lines.
3. Remove Duplicates
Click the green "Remove Duplicates" button. The cleaned list, containing only unique lines, will appear in the right output box.
4. Copy or Clear
Use the "Copy Result" button to copy the unique lines to your clipboard. Click "Clear All" to reset both input and output boxes for a new task.
Frequently Asked Questions
What does "Case-sensitive matching" do?
When checked, it treats lines with different capitalization as unique. For example, "Hello World" and "hello world" will both be kept. If unchecked, they are considered duplicates, and only the first one is kept.
Does this tool preserve the original order of the list?
Yes. The tool keeps the first occurrence of each line and removes subsequent duplicates. The original order of the unique lines is perfectly preserved.
Is there a limit to how much text I can process?
The tool operates in your browser, so the limit depends on your computer's memory. However, it is highly optimized and can handle hundreds of thousands of lines without issue.
Is my data safe?
Absolutely. All processing is done on your computer (client-side). Your data is never sent to our servers, ensuring complete privacy and security.
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