Text
Browser-based
Remove Duplicate Lines
Remove duplicate lines from text. Keep or remove duplicates with case-sensitive and trim options.
All processing is done locally in your browser.
How to use Remove Duplicate Lines
Use Remove Duplicate Lines when you need a quick text utility without installing software or creating an account. Enter your values or text in the tool above, review the instant result, then copy or save the output when the tool supports it.
- Works directly in a modern browser on desktop or mobile.
- Designed for fast repeat use from the root URL
/remove-duplicate-lines. - Input stays in your browser unless a tool clearly says otherwise.
Features
- Remove duplicate lines
- Case-sensitive option
- Trim whitespace before comparing
- Show count of removed duplicates
- Copy result instantly
Use Cases
- Cleaning email lists
- Removing duplicate entries from data
- Deduplicating survey responses
- Preparing clean lists for import
Frequently Asked Questions
Does case-sensitive comparison treat 'Apple' and 'apple' as duplicates?
By default, no. Enable the case-sensitive option to treat them as the same.
Which occurrence is kept when removing duplicates?
The first occurrence of each unique line is kept in its original position.
Does the trim option affect the output?
The trim option only affects comparison. Whitespace in the output is preserved as-is unless you also use Text Cleaner.
Can I see how many duplicates were removed?
Yes! After processing, you'll see the number of duplicate lines that were removed.