Remove duplicate lines from lists and pasted text with case and whitespace controls. Keep the first or last occurrence and export the cleaned result.
Remove duplicate lines from pasted text with whitespace and case controls, while preserving the first or last occurrence. Remove Duplicate Lines is useful for cleaning lists, exports, keyword sets and copied data. The tool reports how many lines were removed so you can verify the transformation before using the output. How to use Remove Duplicate Lines: Paste one item or line per row. Choose whitespace trimming, case sensitivity and whether to keep the first or last duplicate. Review the unique-line result and download or copy it. Common uses: Cleaning exported lists Removing duplicate keywords Preparing unique IDs or records Does it preserve line order? Yes. The default keeps the first occurrence in its original order; keep-last mode retains the final occurrence while preserving the remaining order. Can Apple and apple be treated as duplicates? Yes. Enable Ignore case. Does it remove blank lines? Blank lines are treated as values; the tool does not silently discard them.