Remove duplicate lines
Deduplicate lists instantly — keep the first occurrence, drop the rest.
How to use
- Paste your list into the input box, one item per line.
- Choose Exact match, or Ignore case to merge entries that differ only in capitalisation.
- Copy the deduplicated list from the result pane.
Frequently asked questions
Does the order of my list change?
No. Lines stay in their original order; only repeated occurrences after the first are removed.
Which casing is kept in Ignore case mode?
The first occurrence wins. If "Apple" appears before "apple", the result keeps "Apple".
Is it safe for lists with personal data?
Yes. Deduplication runs entirely in your browser, so emails or names in your list are never uploaded anywhere.
About this tool
Duplicate entries creep into every list: email addresses merged from several exports, keyword lists for ads, log files, inventory codes pasted from spreadsheets. This tool removes repeated lines while preserving the original order, keeping the first occurrence of each entry. The case-insensitive mode additionally treats "Apple" and "apple" as the same item — handy for name and email lists where capitalisation varies. Because everything runs locally in your browser, it is safe to clean lists containing private data such as customer emails.