Remove Duplicate Lines

Remove duplicate lines from your text instantly

Frequently Asked Questions

What does "Preserve case sensitivity" mean?

When this option is checked (default), the tool treats "Hello" and "hello" as different lines. When unchecked, it treats them as the same line regardless of capitalization.

What does "Trim lines before comparing" do?

When enabled (default), the tool removes leading and trailing spaces from each line before checking for duplicates. This ensures that " hello " and "hello" are treated as duplicates.

Can I remove duplicate lines from large files?

Yes! Our tool can handle large amounts of text. However, for extremely large files (100,000+ lines), you might want to process in smaller chunks for best performance.

Does the tool preserve the order of lines?

Yes, the tool preserves the original order of lines. The first occurrence of each unique line is kept, and subsequent duplicates are removed while maintaining the original sequence.

Can I process code files with this tool?

Absolutely! This tool is perfect for removing duplicate lines from code, logs, data files, lists, or any text-based content. Just paste your code/text and click "Remove Duplicates".

Is my data safe and private?

Yes! All processing happens locally in your browser. We don't store or transmit your text to any servers. Your data remains completely private and secure.

Is this tool completely free?

Yes, 100% free! No registration required, no hidden fees, and no limitations on usage. You can use it as much as you need.