Category: Text tools
Remove Duplicate Lines
Clean repeated text lines while keeping the first copy in place
Paste a list and remove repeated lines while keeping the first occurrence order. Trim lines, drop blanks, ignore case and copy the local result.
apple banana cherry
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
This duplicate line remover works on pasted text, one line at a time. It keeps the first occurrence of each distinct line, removes later repeats and leaves the surviving lines in their original order. Options let you compare case-insensitively, trim leading and trailing whitespace before comparison and drop blank or whitespace-only lines. LF, CRLF and bare CR line endings are accepted; the result updates as you type or change options, shows how many lines were removed and can be copied. The tool does not keep the last occurrence, sort the output, show a duplicates-only report, count each line, do fuzzy matching, ignore punctuation, collapse inner whitespace or dedupe by a CSV column. It handles pasted text only, with no file upload or download, and the list is not uploaded to LocalTools.
How to use it
- Paste a line-separated list of emails, URLs, keywords, IDs or other text.
- Choose whether to ignore case, trim each line or drop empty lines before matching.
- Review the removed-line count and copy the deduplicated list in its original order.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- Does it keep the original order of my lines?
- Yes. The first copy of each line stays where it appeared, later matching lines are removed and the remaining lines are not sorted.
- Are Apple and apple treated as the same line?
- Only when ignore case is enabled. The option uses plain lowercasing, so it does not make accent-insensitive, punctuation-insensitive or Unicode-normalized matches.
- Is my text uploaded to a server?
- No. The pasted text and output stay in the browser, and the comparison runs in JavaScript shipped with the page.
- Can I keep the last occurrence instead of the first?
- No. LocalTools always keeps the first occurrence. It has no keep-last mode or occurrence-position selector.
- Can it also sort the result or show only duplicates?
- No. This tool removes repeated lines and reports how many were removed; sorting, duplicates-only views and per-line counts are outside its scope.