How to use the Duplicate Line Remover
- 1Paste your list, one entry per line.
- 2Choose whether to ignore letter case.
- 3Select Remove duplicates and copy the result.
Supported formats and limits
- The first occurrence of each line is kept; later repeats are removed.
- Case-insensitive mode treats 'Apple' and 'apple' as the same line.
- The order of the remaining lines is preserved.
Common uses
- Deduplicating an email or mailing list.
- Cleaning a list of tags or keywords.
- Finding unique entries in exported data.
Frequently asked questions
Are blank lines treated as duplicates?
Yes — repeated blank lines collapse to one. Use Remove Extra Spaces first if you want them gone entirely.