Remove Duplicate Lines
Remove duplicate lines from text while preserving order.
Input
Output
What is removing duplicate lines?
Removing duplicate lines means taking a list or block of text and keeping only one copy of each unique line. The result is a cleaned list with no repeated rows, in the same order as the first occurrence of each line.
Why this tool is useful
Duplicate lines often appear when merging lists, pasting logs, or cleaning data. This tool quickly deduplicates text without changing the order of the first occurrence of each line. Use it to clean up word lists, CSV-like data, URLs, or any multiline content. Optionally trim empty lines to get a tighter result.
Example text cleanup
If you paste lines like: apple, banana, apple, cherry, banana — the output will be: apple, banana, cherry. Order is preserved; only duplicates are removed. The tool works entirely in your browser; nothing is sent to a server.
How to use this tool
Paste or type your multiline text in the input box. The output updates as you type. Use "Trim empty lines" to remove blank lines from the result. Click Copy to copy the deduplicated text, or Clear to start over. For more text tools, try Sort Text Alphabetically or Word Counter.