Paste a multi-line list and strip duplicates while optionally ignoring case or edge spaces. Clean email lists, tags and logs. Processing is in-browser.
Everything runs in your browser. Your input is not sent to a server by this tool.
Open the Remove Duplicate Lines, enter your input, and run the action. Results appear on the same page so you can copy or download without leaving the tool.
The Remove Duplicate Lines processes data with client-side JavaScript where the implementation allows, so core input stays in your browser session for that step.
Get a quick, free result for everyday tasks without installing software or creating an account on a separate service.
Yes—first-seen order is kept.
Blank lines may remain unless trimmed empty and treated as duplicates of each other.
Yes.
Double-check important outputs before using them in documents or production systems. Keep original files when working with uploads until you confirm the result.
ToolBoxy keeps the Free Remove Duplicate Lines free and simple: open the page, finish the task, and move on—no account wall. Related tools on this page point you to the next step.