Delete repeated lines from a list and keep only unique entries.
Processed locally in your browser.
Understanding your result
Order is preserved by default. The summary shows how many duplicate lines were removed.
Formula and method
Each line is compared to those seen before; only the first occurrence is kept. Trimming and case-insensitivity change how lines are considered equal.
Worked example
A list with “Apple, apple, Banana, Apple” becomes “Apple, apple, Banana” — or just “Apple, Banana” with “ignore case” on.
How to use this tool
- Paste your lines.
- Choose trim and case options.
- Copy the cleaned result.
Common mistakes to avoid
- Forgetting that trailing spaces can make otherwise-identical lines look different — enable trim.
About the Remove Duplicate Lines
Strip repeated lines from a list while keeping the first occurrence and the original order.
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Frequently asked questions
Does it keep the order?
Yes. The first occurrence of each line stays in place.