Remove Duplicate Lines

What is Remove Duplicate Lines tool?

A free online tool that removes duplicate lines or duplicate paragraphs from your text. It's perfect for cleaning up lists, removing duplicate entries, and organizing your content.

What's the difference between Lines and Paragraphs mode?

Lines Mode: Removes duplicate lines line-by-line.

• Lines Mode: Each line is compared individually
• Paragraphs Mode: Each paragraph (separated by blank lines) is compared

What do the options do?

Options explained:

• Case Sensitive: "Apple" and "apple" are treated as different
• Trim Spaces: Removes leading/trailing spaces before comparison
• Preserve Empty Lines: Keeps blank lines in the output

Can I preserve the original order?

Yes! This tool preserves the order of lines/paragraphs. The first occurrence of each unique line is kept, and subsequent duplicates are removed.

Is this Remove Duplicate Lines tool free?

Yes! Kognitrick Remove Duplicate Lines is completely free to use. No registration, no hidden charges, no credit card required.

Is my data safe? Do you store my text?

Absolutely! All processing is performed entirely in your browser using JavaScript. Your text never leaves your device — we do not store, track, or share any of your content.

Who can benefit from using this tool?

This tool is useful for:

• 📋 Cleaning up lists and data
• 🔄 Removing duplicate entries
• 📝 Organizing text content
• 🧹 Preparing data for analysis
• 🔧 Developers cleaning test data