Remove Duplicate Lines
Deduplicate lines of text while keeping the original order.
How to use Remove Duplicate Lines
- 1Paste a list or block of text, one item per line.
- 2Toggle case-insensitive matching if needed.
- 3Click Remove Duplicates and copy or download the result.
Why use this tool
- Keeps the first occurrence of each line, preserving original order.
- Optional case-insensitive mode for messy lists.
- Handles thousands of lines instantly, entirely client-side.
Frequently asked questions
Does order matter after deduplication?
Yes — the first occurrence of each unique line is kept in its original position.
Can I deduplicate case-insensitively?
Yes, toggle case-insensitive mode so 'Apple' and 'apple' are treated as duplicates.