Remove Duplicate Lines cleans up any list by deleting repeated lines while keeping the first occurrence, with options to trim whitespace, ignore case, remove empty lines, and sort the result.
What Does This Tool Do?
This tool scans your text line by line and removes any line that has already appeared, leaving you with a clean list of unique entries. It keeps the first occurrence of each line and discards the rest.
Useful options let you trim leading and trailing whitespace before comparing, treat lines as equal regardless of case, drop blank lines, and optionally sort the deduplicated result alphabetically.
Common Uses
- Cleaning up email lists, keyword lists, and CSV columns
- Removing repeated log entries or data rows
- De-duplicating tags, usernames, or URLs
- Tidying any copy-pasted list before importing it elsewhere
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